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Mon, 16 Sep 2024 23:18:47 +0000 (GMT) Received: from epsmgmcp1.samsung.com (unknown [182.195.42.82]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20240916231847epsmtrp2b29813f45bc78aa2f2a91699039eb517~13LrctLtk1941019410epsmtrp2C; Mon, 16 Sep 2024 23:18:47 +0000 (GMT) X-AuditID: b6c32a50-ef5fe70000004d97-11-66e8bcd7cff5 Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgmcp1.samsung.com (Symantec Messaging Gateway) with SMTP id 42.F2.19367.7DCB8E66; Tue, 17 Sep 2024 08:18:47 +0900 (KST) Received: from INBRO002811.samsungds.net (unknown [107.122.5.126]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20240916231844epsmtip24ba2cf6c9c51f43d91dc64c0e231dd0f~13LpR9fJX1066810668epsmtip2s; Mon, 16 Sep 2024 23:18:44 +0000 (GMT) From: Selvarasu Ganesan To: Thinh.Nguyen@synopsys.com, gregkh@linuxfoundation.org, felipe.balbi@linux.intel.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jh0801.jung@samsung.com, dh10.jung@samsung.com, naushad@samsung.com, akash.m5@samsung.com, rc93.raju@samsung.com, taehyun.cho@samsung.com, hongpooh.kim@samsung.com, eomji.oh@samsung.com, shijie.cai@samsung.com, Selvarasu Ganesan , stable@kernel.org Subject: [PATCH v3] usb: dwc3: core: Stop processing of pending events if controller is halted Date: Tue, 17 Sep 2024 04:48:09 +0530 Message-ID: <20240916231813.206-1-selvarasu.g@samsung.com> X-Mailer: git-send-email 2.46.0.windows.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrGJsWRmVeSWpSXmKPExsWy7bCmpu71PS/SDE4tMbB4c3UVq8WdBdOY LE4tX8hkMf9mkkXz4vVsFpP2bGWxuPvwB4vF5V1z2CwWLWtltvh09D+rxarOOSwWR5Z/ZLK4 /H0nUOz8BaDig6IWqxYcYHcQ8Ni0qpPNY97JQI/9c9ewe/RtWcXosWX/Z0aPz5vkAtiism0y UhNTUosUUvOS81My89JtlbyD453jTc0MDHUNLS3MlRTyEnNTbZVcfAJ03TJzgK5WUihLzCkF CgUkFhcr6dvZFOWXlqQqZOQXl9gqpRak5BSYFOgVJ+YWl+al6+WlllgZGhgYmQIVJmRnnN30 i71gu3JF/9pdzA2Mf2S7GDk4JARMJF5OtOhi5OIQEtjDKLHu2EvGLkZOIOcTo8TReckQCSC7 b+V8VpAESMPtpu3sEImdjBJNBx9BOd8ZJZ5tvs8GMpZNwFDi2QkbkAYRgSmMEt/m1oHUMAvM ZpKYt+0tE0hCWCBBounhO3YQm0VAVeLZrZlgNq+AlcShju1sENs0Jdbu3cMEEReUODnzCQuI zSwgL9G8dTYzyFAJgYkcEu/fHoY6z0Vi4r+V7BC2sMSr41ugbCmJz+/2Qg2tllh95yMbRHML o8ThJ9+giuwlHh99xAzyATPQ5vW79CGW8Un0/n7CBAkvXomONiGIalWJU42XoUZKS9xbcg3q BA+J7Z2vocEYK3F09hvGCYxys5C8MAvJC7MQli1gZF7FKJVaUJybnppsWmCom5daDo/M5Pzc TYzgBKsVsINx9Ya/eocYmTgYDzFKcDArifDa/n6aJsSbklhZlVqUH19UmpNafIjRFBiwE5ml RJPzgSk+ryTe0MTSwMTMzMzE0tjMUEmc93Xr3BQhgfTEktTs1NSC1CKYPiYOTqkGJnEu/xPH bm7tzVSybuVwn1+1IFI0V0AopvV4xYMa4+DC2+tt9/2pEZ+5YdLyxC9Z51SCzzt3e6qwseQI nXuwRSozfInZ/dKULFdX/ksnDR81fT1+tYPXbd+LuQc8F18Uv5vO5lfnusrzZvyDgmvG9qk+ Uh9zN9QE3GfKiHcLY3/P7OF9eF9hQ+OaBcYHXEsFuhc+jRcRjmq4JeS24njJqXxjTr+lNtPv FN5bwDG9q/uGU3Sm6aflUsrnfnqt52+pvRGuWLbC9WX0d5Zq3ytybQkJ3LIzmLtuvE8VrFty heXZsUk9jktrDDQjHiWsN6ypSjhw83S7FLP7Fgm3+gVqj8zvi+Q7J3xNfStfxanEUpyRaKjF XFScCAAtepIkOQQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrNLMWRmVeSWpSXmKPExsWy7bCSvO71PS/SDLpncFu8ubqK1eLOgmlM FqeWL2SymH8zyaJ58Xo2i0l7trJY3H34g8Xi8q45bBaLlrUyW3w6+p/VYlXnHBaLI8s/Mllc /r4TKHb+AlDxQVGLVQsOsDsIeGxa1cnmMe9koMf+uWvYPfq2rGL02LL/M6PH501yAWxRXDYp qTmZZalF+nYJXBlnN/1iL9iuXNG/dhdzA+Mf2S5GTg4JAROJ203b2bsYuTiEBLYzSrxdMoUV IiEt8XpWFyOELSyx8t9zqKKvjBK3Xk5g6WLk4GATMJR4dsIGJC4iMINR4smna6wgDrPASiaJ P1dmgXULC8RJ7L48lQnEZhFQlXh2ayY7iM0rYCVxqGM7G8QGTYm1e/cwQcQFJU7OfMICYjML yEs0b53NPIGRbxaS1CwkqQWMTKsYRVMLinPTc5MLDPWKE3OLS/PS9ZLzczcxgsNfK2gH47L1 f/UOMTJxMB5ilOBgVhLhtf39NE2INyWxsiq1KD++qDQntfgQozQHi5I4r3JOZ4qQQHpiSWp2 ampBahFMlomDU6qBya758Ylb+iWhSybHJN/8fUUgkFf19v3AM0ZJRwVf9fy5whkSXmhytPfR PCbbRYG7eHhXbHTQV1uqcfbrs/uHc2+9UV7DxzZX+xaDnPQcecf4hcaeeR2vhDOtuPt3NEwQ 6ihsFmpzU9E7cTjM52LMg7Xrnx19+HiRl1H8mVUMMiXxjzTywywFv6tMUlvcrmPYzqMQIzRp /+yFGWrXT8VrHC0Ia36VO++8daP0owBmkfgpfCY5/utec/7eWLx6QsPv35cPmP02ZLDtnZKe 81pow4n/PSX8pQp8tm4SRvtepkoZ8zR4T1ta73P3YsnShPWzLzudnMaiP117gsaqx9Zrl02a H+N4//n39SqqizfWK7EUZyQaajEXFScCAD1+1tHuAgAA X-CMS-MailID: 20240916231847epcas5p19dc48e3baeea70619dc766ba86938fee X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20240916231847epcas5p19dc48e3baeea70619dc766ba86938fee References: This commit addresses an issue where events were being processed when the controller was in a halted state. To fix this issue by stop processing the events as the event count was considered stale or invalid when the controller was halted. Fixes: fc8bb91bc83e ("usb: dwc3: implement runtime PM") Cc: stable@kernel.org Signed-off-by: Selvarasu Ganesan Suggested-by: Thinh Nguyen Acked-by: Thinh Nguyen --- Changes in v3: - Updated Cc tag and a typo mistake. - Link to v2: https://lore.kernel.org/lkml/20240916224543.187-1-selvarasu.g= @samsung.com/ --- Changes in v2: - Updated the code changes that suggested by reviewer (Thinh Nguyen). - Link to v1: https://lore.kernel.org/lkml/20240719110100.329-1-selvarasu.g= @samsung.com/ --- drivers/usb/dwc3/core.c | 22 +++++++++++++++++++--- drivers/usb/dwc3/core.h | 4 ---- drivers/usb/dwc3/gadget.c | 11 ----------- 3 files changed, 19 insertions(+), 18 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 9eb085f359ce..152376977a8e 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -544,6 +544,7 @@ static int dwc3_alloc_event_buffers(struct dwc3 *dwc, u= nsigned int length) int dwc3_event_buffers_setup(struct dwc3 *dwc) { struct dwc3_event_buffer *evt; + u32 reg; =20 if (!dwc->ev_buf) return 0; @@ -556,8 +557,10 @@ int dwc3_event_buffers_setup(struct dwc3 *dwc) upper_32_bits(evt->dma)); dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), DWC3_GEVNTSIZ_SIZE(evt->length)); - dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0); =20 + /* Clear any stale event */ + reg =3D dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0)); + dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), reg); return 0; } =20 @@ -584,7 +587,10 @@ void dwc3_event_buffers_cleanup(struct dwc3 *dwc) dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0), 0); dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), DWC3_GEVNTSIZ_INTMASK | DWC3_GEVNTSIZ_SIZE(0)); - dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0); + + /* Clear any stale event */ + reg =3D dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0)); + dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), reg); } =20 static void dwc3_core_num_eps(struct dwc3 *dwc) @@ -2499,7 +2505,11 @@ static int dwc3_runtime_resume(struct device *dev) =20 switch (dwc->current_dr_role) { case DWC3_GCTL_PRTCAP_DEVICE: - dwc3_gadget_process_pending_events(dwc); + if (dwc->pending_events) { + pm_runtime_put(dwc->dev); + dwc->pending_events =3D false; + enable_irq(dwc->irq_gadget); + } break; case DWC3_GCTL_PRTCAP_HOST: default: @@ -2589,6 +2599,12 @@ static void dwc3_complete(struct device *dev) static const struct dev_pm_ops dwc3_dev_pm_ops =3D { SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume) .complete =3D dwc3_complete, + + /* + * Runtime suspend halts the controller on disconnection. It relies on + * platforms with custom connection notification to start the controller + * again. + */ SET_RUNTIME_PM_OPS(dwc3_runtime_suspend, dwc3_runtime_resume, dwc3_runtime_idle) }; diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index c71240e8f7c7..9c508e0c5cdf 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1675,7 +1675,6 @@ static inline void dwc3_otg_host_init(struct dwc3 *dw= c) #if !IS_ENABLED(CONFIG_USB_DWC3_HOST) int dwc3_gadget_suspend(struct dwc3 *dwc); int dwc3_gadget_resume(struct dwc3 *dwc); -void dwc3_gadget_process_pending_events(struct dwc3 *dwc); #else static inline int dwc3_gadget_suspend(struct dwc3 *dwc) { @@ -1687,9 +1686,6 @@ static inline int dwc3_gadget_resume(struct dwc3 *dwc) return 0; } =20 -static inline void dwc3_gadget_process_pending_events(struct dwc3 *dwc) -{ -} #endif /* !IS_ENABLED(CONFIG_USB_DWC3_HOST) */ =20 #if IS_ENABLED(CONFIG_USB_DWC3_ULPI) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 291bc549935b..10178e5eda5a 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -4728,14 +4728,3 @@ int dwc3_gadget_resume(struct dwc3 *dwc) =20 return dwc3_gadget_soft_connect(dwc); } - -void dwc3_gadget_process_pending_events(struct dwc3 *dwc) -{ - if (dwc->pending_events) { - dwc3_interrupt(dwc->irq_gadget, dwc->ev_buf); - dwc3_thread_interrupt(dwc->irq_gadget, dwc->ev_buf); - pm_runtime_put(dwc->dev); - dwc->pending_events =3D false; - enable_irq(dwc->irq_gadget); - } -} --=20 2.17.1