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([171.76.83.141]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-842e35d4becsm10304580a12.79.2024.12.26.11.49.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Dec 2024 11:49:40 -0800 (PST) From: Nihar Chaithanya To: dpenkler@gmail.com, gregkh@linuxfoundation.org Cc: dan.carpenter@linaro.org, skhan@linuxfoundation.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Nihar Chaithanya Subject: [PATCH v4 11/15] staging: gpib: ines: Handle gpib_register_driver() errors Date: Fri, 27 Dec 2024 01:06:35 +0530 Message-Id: <20241226193637.241049-12-niharchaithanya@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241226193637.241049-1-niharchaithanya@gmail.com> References: <20241226193637.241049-1-niharchaithanya@gmail.com> 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 Content-Type: text/plain; charset="utf-8" The function ines_pcmcia_init_module() can be replaced by calling pcmcia_register_driver() directly. The error value from this function is not returned and the previous registering functions are not unregistered. The function gpib_register_driver() can fail and similar to pcmcia_register_driver() function failing, the previous registering functions are not unregistered. Replace cb_pcmcia_init_module() with pcmcia_register_driver(). Unregister the gpib and pci register functions if the subsequent gpib or pcmcia register functions fail and return the error value. Signed-off-by: Nihar Chaithanya --- drivers/staging/gpib/ines/ines_gpib.c | 78 +++++++++++++++++++-------- 1 file changed, 56 insertions(+), 22 deletions(-) diff --git a/drivers/staging/gpib/ines/ines_gpib.c b/drivers/staging/gpib/i= nes/ines_gpib.c index 9d8387c3bf01..dda9205bfd97 100644 --- a/drivers/staging/gpib/ines/ines_gpib.c +++ b/drivers/staging/gpib/ines/ines_gpib.c @@ -1227,12 +1227,6 @@ static struct pcmcia_driver ines_gpib_cs_driver =3D { .resume =3D ines_gpib_resume, }; =20 -int ines_pcmcia_init_module(void) -{ - pcmcia_register_driver(&ines_gpib_cs_driver); - return 0; -} - void ines_pcmcia_cleanup_module(void) { DEBUG(0, "ines_cs: unloading\n"); @@ -1420,28 +1414,68 @@ void ines_pcmcia_detach(gpib_board_t *board) =20 static int __init ines_init_module(void) { - int err =3D 0; + int ret; =20 - err =3D pci_register_driver(&ines_pci_driver); - if (err) { - pr_err("ines_gpib: pci_driver_register failed!\n"); - return err; - } + ret =3D pci_register_driver(&ines_pci_driver); + if (ret) + return ret; + + ret =3D gpib_register_driver(&ines_pci_interface, THIS_MODULE); + if (ret) + goto err_pci; + + ret =3D gpib_register_driver(&ines_pci_unaccel_interface, THIS_MODULE); + if (ret) + goto err_pci_unaccel; + + ret =3D gpib_register_driver(&ines_pci_accel_interface, THIS_MODULE); + if (ret) + goto err_pci_accel; + + ret =3D gpib_register_driver(&ines_isa_interface, THIS_MODULE); + if (ret) + goto err_isa; =20 - gpib_register_driver(&ines_pci_interface, THIS_MODULE); - gpib_register_driver(&ines_pci_unaccel_interface, THIS_MODULE); - gpib_register_driver(&ines_pci_accel_interface, THIS_MODULE); - gpib_register_driver(&ines_isa_interface, THIS_MODULE); #ifdef GPIB_PCMCIA - gpib_register_driver(&ines_pcmcia_interface, THIS_MODULE); - gpib_register_driver(&ines_pcmcia_unaccel_interface, THIS_MODULE); - gpib_register_driver(&ines_pcmcia_accel_interface, THIS_MODULE); - err +=3D ines_pcmcia_init_module(); + ret =3D gpib_register_driver(&ines_pcmcia_interface, THIS_MODULE); + if (ret) + goto err_pcmcia; + + ret =3D gpib_register_driver(&ines_pcmcia_unaccel_interface, THIS_MODULE); + if (ret) + goto err_pcmcia_unaccel; + + ret =3D gpib_register_driver(&ines_pcmcia_accel_interface, THIS_MODULE); + if (ret) + goto err_pcmcia_accel; + + ret =3D pcmcia_register_driver(&ines_gpib_cs_driver); + if (ret) + goto err_pcmcia_driver; #endif - if (err) - return -1; =20 return 0; + +#ifdef GPIB_PCMCIA +err_pcmcia_driver: + gpib_unregister_driver(&ines_pcmcia_accel_interface); +err_pcmcia_accel: + gpib_unregister_driver(&ines_pcmcia_unaccel_interface); +err_pcmcia_unaccel: + gpib_unregister_driver(&ines_pcmcia_interface); +err_pcmcia: +#endif + gpib_unregister_driver(&ines_isa_interface); +err_isa: + gpib_unregister_driver(&ines_pci_accel_interface); +err_pci_accel: + gpib_unregister_driver(&ines_pci_unaccel_interface); +err_pci_unaccel: + gpib_unregister_driver(&ines_pci_interface); +err_pci: + pci_unregister_driver(&ines_pci_driver); + + return ret; } =20 static void __exit ines_exit_module(void) --=20 2.34.1