Add irq allocation functions. This will help
to allocate IRQs to both netdev and RoCE aux devices.
Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Bhargava Chenna Marreddy <bhargava.marreddy@broadcom.com>
Reviewed-by: Rajashekar Hudumula <rajashekar.hudumula@broadcom.com>
---
drivers/net/ethernet/broadcom/bnge/bnge.h | 3 +
.../net/ethernet/broadcom/bnge/bnge_resc.c | 69 +++++++++++++++++++
.../net/ethernet/broadcom/bnge/bnge_resc.h | 13 ++++
3 files changed, 85 insertions(+)
diff --git a/drivers/net/ethernet/broadcom/bnge/bnge.h b/drivers/net/ethernet/broadcom/bnge/bnge.h
index b58d8fc6f258..3c161b1a9b62 100644
--- a/drivers/net/ethernet/broadcom/bnge/bnge.h
+++ b/drivers/net/ethernet/broadcom/bnge/bnge.h
@@ -172,6 +172,9 @@ struct bnge_dev {
#define BNGE_SUPPORTS_TPA(bd) ((bd)->max_tpa_v2)
u8 num_tc;
+
+ struct bnge_irq *irq_tbl;
+ u16 irqs_acquired;
};
static inline bool bnge_is_roce_en(struct bnge_dev *bd)
diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_resc.c b/drivers/net/ethernet/broadcom/bnge/bnge_resc.c
index 68e094474822..84f91e05a2b0 100644
--- a/drivers/net/ethernet/broadcom/bnge/bnge_resc.c
+++ b/drivers/net/ethernet/broadcom/bnge/bnge_resc.c
@@ -326,3 +326,72 @@ int bnge_reserve_rings(struct bnge_dev *bd)
return rc;
}
+
+int bnge_alloc_irqs(struct bnge_dev *bd)
+{
+ u16 aux_msix, tx_cp, num_entries;
+ u16 irqs_demand, max, min = 1;
+ int i, rc = 0;
+
+ irqs_demand = bnge_nqs_demand(bd);
+ max = bnge_get_max_func_irqs(bd);
+ if (irqs_demand > max)
+ irqs_demand = max;
+
+ if (!(bd->flags & BNGE_EN_SHARED_CHNL))
+ min = 2;
+
+ irqs_demand = pci_alloc_irq_vectors(bd->pdev, min, irqs_demand,
+ PCI_IRQ_MSIX);
+ aux_msix = bnge_aux_get_msix(bd);
+ if (irqs_demand < 0 || irqs_demand < aux_msix) {
+ rc = -ENODEV;
+ goto err_free_irqs;
+ }
+
+ num_entries = irqs_demand;
+ if (pci_msix_can_alloc_dyn(bd->pdev))
+ num_entries = max;
+ bd->irq_tbl = kcalloc(num_entries, sizeof(*bd->irq_tbl), GFP_KERNEL);
+ if (!bd->irq_tbl) {
+ rc = -ENOMEM;
+ goto err_free_irqs;
+ }
+
+ for (i = 0; i < irqs_demand; i++)
+ bd->irq_tbl[i].vector = pci_irq_vector(bd->pdev, i);
+
+ bd->irqs_acquired = irqs_demand;
+ /* Reduce rings based upon num of vectors allocated.
+ * We dont need to consider NQs as they have been calculated
+ * and must be more than irqs_demand.
+ */
+ rc = bnge_adjust_rings(bd, &bd->rx_nr_rings,
+ &bd->tx_nr_rings,
+ irqs_demand - aux_msix, min == 1);
+ if (rc)
+ goto err_free_irqs;
+
+ tx_cp = bnge_num_tx_to_cp(bd, bd->tx_nr_rings);
+ bd->nq_nr_rings = (min == 1) ?
+ max_t(u16, tx_cp, bd->rx_nr_rings) :
+ tx_cp + bd->rx_nr_rings;
+
+ /* Readjust tx_nr_rings_per_tc */
+ if (!bd->num_tc)
+ bd->tx_nr_rings_per_tc = bd->tx_nr_rings;
+
+ return 0;
+
+err_free_irqs:
+ dev_err(bd->dev, "Failed to allocate IRQs err = %d\n", rc);
+ bnge_free_irqs(bd);
+ return rc;
+}
+
+void bnge_free_irqs(struct bnge_dev *bd)
+{
+ pci_free_irq_vectors(bd->pdev);
+ kfree(bd->irq_tbl);
+ bd->irq_tbl = NULL;
+}
diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_resc.h b/drivers/net/ethernet/broadcom/bnge/bnge_resc.h
index c6cef514588f..23db93e03787 100644
--- a/drivers/net/ethernet/broadcom/bnge/bnge_resc.h
+++ b/drivers/net/ethernet/broadcom/bnge/bnge_resc.h
@@ -51,8 +51,21 @@ struct bnge_hw_rings {
u16 rss_ctx;
};
+/* "TXRX", 2 hypens, plus maximum integer */
+#define BNGE_IRQ_NAME_EXTRA 17
+struct bnge_irq {
+ irq_handler_t handler;
+ unsigned int vector;
+ u8 requested:1;
+ u8 have_cpumask:1;
+ char name[IFNAMSIZ + BNGE_IRQ_NAME_EXTRA];
+ cpumask_var_t cpu_mask;
+};
+
int bnge_reserve_rings(struct bnge_dev *bd);
int bnge_fix_rings_count(u16 *rx, u16 *tx, u16 max, bool shared);
+int bnge_alloc_irqs(struct bnge_dev *bd);
+void bnge_free_irqs(struct bnge_dev *bd);
static inline u32
bnge_adjust_pow_two(u32 total_ent, u16 ent_per_blk)
--
2.47.1Hi Vikas,
kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.16-rc3 next-20250624]
[cannot apply to horms-ipvs/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Vikas-Gupta/bng_en-Add-PCI-interface/20250618-173130
base: linus/master
patch link: https://lore.kernel.org/r/20250618144743.843815-9-vikas.gupta%40broadcom.com
patch subject: [net-next, 08/10] bng_en: Add irq allocation support
config: parisc-randconfig-r073-20250619 (https://download.01.org/0day-ci/archive/20250625/202506251636.aTzmB45K-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 8.5.0
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506251636.aTzmB45K-lkp@intel.com/
smatch warnings:
drivers/net/ethernet/broadcom/bnge/bnge_resc.c:347 bnge_alloc_irqs() warn: unsigned 'irqs_demand' is never less than zero.
vim +/irqs_demand +347 drivers/net/ethernet/broadcom/bnge/bnge_resc.c
329
330 int bnge_alloc_irqs(struct bnge_dev *bd)
331 {
332 u16 aux_msix, tx_cp, num_entries;
333 u16 irqs_demand, max, min = 1;
334 int i, rc = 0;
335
336 irqs_demand = bnge_nqs_demand(bd);
337 max = bnge_get_max_func_irqs(bd);
338 if (irqs_demand > max)
339 irqs_demand = max;
340
341 if (!(bd->flags & BNGE_EN_SHARED_CHNL))
342 min = 2;
343
344 irqs_demand = pci_alloc_irq_vectors(bd->pdev, min, irqs_demand,
345 PCI_IRQ_MSIX);
346 aux_msix = bnge_aux_get_msix(bd);
> 347 if (irqs_demand < 0 || irqs_demand < aux_msix) {
348 rc = -ENODEV;
349 goto err_free_irqs;
350 }
351
352 num_entries = irqs_demand;
353 if (pci_msix_can_alloc_dyn(bd->pdev))
354 num_entries = max;
355 bd->irq_tbl = kcalloc(num_entries, sizeof(*bd->irq_tbl), GFP_KERNEL);
356 if (!bd->irq_tbl) {
357 rc = -ENOMEM;
358 goto err_free_irqs;
359 }
360
361 for (i = 0; i < irqs_demand; i++)
362 bd->irq_tbl[i].vector = pci_irq_vector(bd->pdev, i);
363
364 bd->irqs_acquired = irqs_demand;
365 /* Reduce rings based upon num of vectors allocated.
366 * We dont need to consider NQs as they have been calculated
367 * and must be more than irqs_demand.
368 */
369 rc = bnge_adjust_rings(bd, &bd->rx_nr_rings,
370 &bd->tx_nr_rings,
371 irqs_demand - aux_msix, min == 1);
372 if (rc)
373 goto err_free_irqs;
374
375 tx_cp = bnge_num_tx_to_cp(bd, bd->tx_nr_rings);
376 bd->nq_nr_rings = (min == 1) ?
377 max_t(u16, tx_cp, bd->rx_nr_rings) :
378 tx_cp + bd->rx_nr_rings;
379
380 /* Readjust tx_nr_rings_per_tc */
381 if (!bd->num_tc)
382 bd->tx_nr_rings_per_tc = bd->tx_nr_rings;
383
384 return 0;
385
386 err_free_irqs:
387 dev_err(bd->dev, "Failed to allocate IRQs err = %d\n", rc);
388 bnge_free_irqs(bd);
389 return rc;
390 }
391
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Hi Vikas,
kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.16-rc3 next-20250620]
[cannot apply to horms-ipvs/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Vikas-Gupta/bng_en-Add-PCI-interface/20250618-173130
base: linus/master
patch link: https://lore.kernel.org/r/20250618144743.843815-9-vikas.gupta%40broadcom.com
patch subject: [net-next, 08/10] bng_en: Add irq allocation support
config: parisc-randconfig-r073-20250619 (https://download.01.org/0day-ci/archive/20250623/202506231320.YMpashmK-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 8.5.0
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506231320.YMpashmK-lkp@intel.com/
smatch warnings:
drivers/net/ethernet/broadcom/bnge/bnge_resc.c:347 bnge_alloc_irqs() warn: unsigned 'irqs_demand' is never less than zero.
vim +/irqs_demand +347 drivers/net/ethernet/broadcom/bnge/bnge_resc.c
329
330 int bnge_alloc_irqs(struct bnge_dev *bd)
331 {
332 u16 aux_msix, tx_cp, num_entries;
333 u16 irqs_demand, max, min = 1;
334 int i, rc = 0;
335
336 irqs_demand = bnge_nqs_demand(bd);
337 max = bnge_get_max_func_irqs(bd);
338 if (irqs_demand > max)
339 irqs_demand = max;
340
341 if (!(bd->flags & BNGE_EN_SHARED_CHNL))
342 min = 2;
343
344 irqs_demand = pci_alloc_irq_vectors(bd->pdev, min, irqs_demand,
345 PCI_IRQ_MSIX);
346 aux_msix = bnge_aux_get_msix(bd);
> 347 if (irqs_demand < 0 || irqs_demand < aux_msix) {
348 rc = -ENODEV;
349 goto err_free_irqs;
350 }
351
352 num_entries = irqs_demand;
353 if (pci_msix_can_alloc_dyn(bd->pdev))
354 num_entries = max;
355 bd->irq_tbl = kcalloc(num_entries, sizeof(*bd->irq_tbl), GFP_KERNEL);
356 if (!bd->irq_tbl) {
357 rc = -ENOMEM;
358 goto err_free_irqs;
359 }
360
361 for (i = 0; i < irqs_demand; i++)
362 bd->irq_tbl[i].vector = pci_irq_vector(bd->pdev, i);
363
364 bd->irqs_acquired = irqs_demand;
365 /* Reduce rings based upon num of vectors allocated.
366 * We dont need to consider NQs as they have been calculated
367 * and must be more than irqs_demand.
368 */
369 rc = bnge_adjust_rings(bd, &bd->rx_nr_rings,
370 &bd->tx_nr_rings,
371 irqs_demand - aux_msix, min == 1);
372 if (rc)
373 goto err_free_irqs;
374
375 tx_cp = bnge_num_tx_to_cp(bd, bd->tx_nr_rings);
376 bd->nq_nr_rings = (min == 1) ?
377 max_t(u16, tx_cp, bd->rx_nr_rings) :
378 tx_cp + bd->rx_nr_rings;
379
380 /* Readjust tx_nr_rings_per_tc */
381 if (!bd->num_tc)
382 bd->tx_nr_rings_per_tc = bd->tx_nr_rings;
383
384 return 0;
385
386 err_free_irqs:
387 dev_err(bd->dev, "Failed to allocate IRQs err = %d\n", rc);
388 bnge_free_irqs(bd);
389 return rc;
390 }
391
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Hi Vikas,
kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.16-rc2 next-20250620]
[cannot apply to horms-ipvs/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Vikas-Gupta/bng_en-Add-PCI-interface/20250618-173130
base: linus/master
patch link: https://lore.kernel.org/r/20250618144743.843815-9-vikas.gupta%40broadcom.com
patch subject: [net-next, 08/10] bng_en: Add irq allocation support
config: parisc-randconfig-r073-20250619 (https://download.01.org/0day-ci/archive/20250622/202506221311.dmMiJyFp-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 8.5.0
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506221311.dmMiJyFp-lkp@intel.com/
smatch warnings:
drivers/net/ethernet/broadcom/bnge/bnge_resc.c:347 bnge_alloc_irqs() warn: unsigned 'irqs_demand' is never less than zero.
vim +/irqs_demand +347 drivers/net/ethernet/broadcom/bnge/bnge_resc.c
329
330 int bnge_alloc_irqs(struct bnge_dev *bd)
331 {
332 u16 aux_msix, tx_cp, num_entries;
333 u16 irqs_demand, max, min = 1;
334 int i, rc = 0;
335
336 irqs_demand = bnge_nqs_demand(bd);
337 max = bnge_get_max_func_irqs(bd);
338 if (irqs_demand > max)
339 irqs_demand = max;
340
341 if (!(bd->flags & BNGE_EN_SHARED_CHNL))
342 min = 2;
343
344 irqs_demand = pci_alloc_irq_vectors(bd->pdev, min, irqs_demand,
345 PCI_IRQ_MSIX);
346 aux_msix = bnge_aux_get_msix(bd);
> 347 if (irqs_demand < 0 || irqs_demand < aux_msix) {
348 rc = -ENODEV;
349 goto err_free_irqs;
350 }
351
352 num_entries = irqs_demand;
353 if (pci_msix_can_alloc_dyn(bd->pdev))
354 num_entries = max;
355 bd->irq_tbl = kcalloc(num_entries, sizeof(*bd->irq_tbl), GFP_KERNEL);
356 if (!bd->irq_tbl) {
357 rc = -ENOMEM;
358 goto err_free_irqs;
359 }
360
361 for (i = 0; i < irqs_demand; i++)
362 bd->irq_tbl[i].vector = pci_irq_vector(bd->pdev, i);
363
364 bd->irqs_acquired = irqs_demand;
365 /* Reduce rings based upon num of vectors allocated.
366 * We dont need to consider NQs as they have been calculated
367 * and must be more than irqs_demand.
368 */
369 rc = bnge_adjust_rings(bd, &bd->rx_nr_rings,
370 &bd->tx_nr_rings,
371 irqs_demand - aux_msix, min == 1);
372 if (rc)
373 goto err_free_irqs;
374
375 tx_cp = bnge_num_tx_to_cp(bd, bd->tx_nr_rings);
376 bd->nq_nr_rings = (min == 1) ?
377 max_t(u16, tx_cp, bd->rx_nr_rings) :
378 tx_cp + bd->rx_nr_rings;
379
380 /* Readjust tx_nr_rings_per_tc */
381 if (!bd->num_tc)
382 bd->tx_nr_rings_per_tc = bd->tx_nr_rings;
383
384 return 0;
385
386 err_free_irqs:
387 dev_err(bd->dev, "Failed to allocate IRQs err = %d\n", rc);
388 bnge_free_irqs(bd);
389 return rc;
390 }
391
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Hi Vikas,
kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.16-rc2 next-20250619]
[cannot apply to horms-ipvs/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Vikas-Gupta/bng_en-Add-PCI-interface/20250618-173130
base: linus/master
patch link: https://lore.kernel.org/r/20250618144743.843815-9-vikas.gupta%40broadcom.com
patch subject: [net-next, 08/10] bng_en: Add irq allocation support
config: parisc-randconfig-r073-20250619 (https://download.01.org/0day-ci/archive/20250620/202506200530.jiD9Txum-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 8.5.0
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506200530.jiD9Txum-lkp@intel.com/
smatch warnings:
drivers/net/ethernet/broadcom/bnge/bnge_resc.c:347 bnge_alloc_irqs() warn: unsigned 'irqs_demand' is never less than zero.
vim +/irqs_demand +347 drivers/net/ethernet/broadcom/bnge/bnge_resc.c
329
330 int bnge_alloc_irqs(struct bnge_dev *bd)
331 {
332 u16 aux_msix, tx_cp, num_entries;
333 u16 irqs_demand, max, min = 1;
334 int i, rc = 0;
335
336 irqs_demand = bnge_nqs_demand(bd);
337 max = bnge_get_max_func_irqs(bd);
338 if (irqs_demand > max)
339 irqs_demand = max;
340
341 if (!(bd->flags & BNGE_EN_SHARED_CHNL))
342 min = 2;
343
344 irqs_demand = pci_alloc_irq_vectors(bd->pdev, min, irqs_demand,
345 PCI_IRQ_MSIX);
346 aux_msix = bnge_aux_get_msix(bd);
> 347 if (irqs_demand < 0 || irqs_demand < aux_msix) {
348 rc = -ENODEV;
349 goto err_free_irqs;
350 }
351
352 num_entries = irqs_demand;
353 if (pci_msix_can_alloc_dyn(bd->pdev))
354 num_entries = max;
355 bd->irq_tbl = kcalloc(num_entries, sizeof(*bd->irq_tbl), GFP_KERNEL);
356 if (!bd->irq_tbl) {
357 rc = -ENOMEM;
358 goto err_free_irqs;
359 }
360
361 for (i = 0; i < irqs_demand; i++)
362 bd->irq_tbl[i].vector = pci_irq_vector(bd->pdev, i);
363
364 bd->irqs_acquired = irqs_demand;
365 /* Reduce rings based upon num of vectors allocated.
366 * We dont need to consider NQs as they have been calculated
367 * and must be more than irqs_demand.
368 */
369 rc = bnge_adjust_rings(bd, &bd->rx_nr_rings,
370 &bd->tx_nr_rings,
371 irqs_demand - aux_msix, min == 1);
372 if (rc)
373 goto err_free_irqs;
374
375 tx_cp = bnge_num_tx_to_cp(bd, bd->tx_nr_rings);
376 bd->nq_nr_rings = (min == 1) ?
377 max_t(u16, tx_cp, bd->rx_nr_rings) :
378 tx_cp + bd->rx_nr_rings;
379
380 /* Readjust tx_nr_rings_per_tc */
381 if (!bd->num_tc)
382 bd->tx_nr_rings_per_tc = bd->tx_nr_rings;
383
384 return 0;
385
386 err_free_irqs:
387 dev_err(bd->dev, "Failed to allocate IRQs err = %d\n", rc);
388 bnge_free_irqs(bd);
389 return rc;
390 }
391
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
On 18/06/2025 15:47, Vikas Gupta wrote:
> Add irq allocation functions. This will help
> to allocate IRQs to both netdev and RoCE aux devices.
>
> Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
> Reviewed-by: Bhargava Chenna Marreddy <bhargava.marreddy@broadcom.com>
> Reviewed-by: Rajashekar Hudumula <rajashekar.hudumula@broadcom.com>
> ---
> drivers/net/ethernet/broadcom/bnge/bnge.h | 3 +
> .../net/ethernet/broadcom/bnge/bnge_resc.c | 69 +++++++++++++++++++
> .../net/ethernet/broadcom/bnge/bnge_resc.h | 13 ++++
> 3 files changed, 85 insertions(+)
>
> diff --git a/drivers/net/ethernet/broadcom/bnge/bnge.h b/drivers/net/ethernet/broadcom/bnge/bnge.h
> index b58d8fc6f258..3c161b1a9b62 100644
> --- a/drivers/net/ethernet/broadcom/bnge/bnge.h
> +++ b/drivers/net/ethernet/broadcom/bnge/bnge.h
> @@ -172,6 +172,9 @@ struct bnge_dev {
> #define BNGE_SUPPORTS_TPA(bd) ((bd)->max_tpa_v2)
>
> u8 num_tc;
> +
> + struct bnge_irq *irq_tbl;
> + u16 irqs_acquired;
> };
>
> static inline bool bnge_is_roce_en(struct bnge_dev *bd)
> diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_resc.c b/drivers/net/ethernet/broadcom/bnge/bnge_resc.c
> index 68e094474822..84f91e05a2b0 100644
> --- a/drivers/net/ethernet/broadcom/bnge/bnge_resc.c
> +++ b/drivers/net/ethernet/broadcom/bnge/bnge_resc.c
> @@ -326,3 +326,72 @@ int bnge_reserve_rings(struct bnge_dev *bd)
>
> return rc;
> }
> +
> +int bnge_alloc_irqs(struct bnge_dev *bd)
> +{
> + u16 aux_msix, tx_cp, num_entries;
> + u16 irqs_demand, max, min = 1;
> + int i, rc = 0;
This assignment is not needed. Error paths re-assign proper error code
while normal flow re-assigns rc to the return value of
bnge_adjust_rings()
> +
> + irqs_demand = bnge_nqs_demand(bd);
> + max = bnge_get_max_func_irqs(bd);
> + if (irqs_demand > max)
> + irqs_demand = max;
> +
> + if (!(bd->flags & BNGE_EN_SHARED_CHNL))
> + min = 2;
> +
> + irqs_demand = pci_alloc_irq_vectors(bd->pdev, min, irqs_demand,
> + PCI_IRQ_MSIX);
> + aux_msix = bnge_aux_get_msix(bd);
> + if (irqs_demand < 0 || irqs_demand < aux_msix) {
> + rc = -ENODEV;
> + goto err_free_irqs;
> + }
> +
> + num_entries = irqs_demand;
> + if (pci_msix_can_alloc_dyn(bd->pdev))
> + num_entries = max;
> + bd->irq_tbl = kcalloc(num_entries, sizeof(*bd->irq_tbl), GFP_KERNEL);
> + if (!bd->irq_tbl) {
> + rc = -ENOMEM;
> + goto err_free_irqs;
> + }
> +
> + for (i = 0; i < irqs_demand; i++)
> + bd->irq_tbl[i].vector = pci_irq_vector(bd->pdev, i);
> +
> + bd->irqs_acquired = irqs_demand;
> + /* Reduce rings based upon num of vectors allocated.
> + * We dont need to consider NQs as they have been calculated
> + * and must be more than irqs_demand.
> + */
> + rc = bnge_adjust_rings(bd, &bd->rx_nr_rings,
> + &bd->tx_nr_rings,
> + irqs_demand - aux_msix, min == 1);
> + if (rc)
> + goto err_free_irqs;
> +
> + tx_cp = bnge_num_tx_to_cp(bd, bd->tx_nr_rings);
> + bd->nq_nr_rings = (min == 1) ?
> + max_t(u16, tx_cp, bd->rx_nr_rings) :
> + tx_cp + bd->rx_nr_rings;
> +
> + /* Readjust tx_nr_rings_per_tc */
> + if (!bd->num_tc)
> + bd->tx_nr_rings_per_tc = bd->tx_nr_rings;
> +
> + return 0;
> +
> +err_free_irqs:
> + dev_err(bd->dev, "Failed to allocate IRQs err = %d\n", rc);
> + bnge_free_irqs(bd);
> + return rc;
> +}
[...]
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