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ipack: tpci200: fix memory leak in the tpci200_register

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The error handling code in tpci200_register does not free interface_regs
allocated by ioremap and the current version of error handling code is
problematic.

Fix this by refactoring the error handling code and free interface_regs
when necessary.

Fixes: 43986798fd ("ipack: add error handling for ioremap_nocache")
Cc: stable@vger.kernel.org
Reported-by: Dongliang Mu <mudongliangabcd@gmail.com>
Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com>
Link: https://lore.kernel.org/r/20210810100323.3938492-2-mudongliangabcd@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dongliang Mu 2021-08-10 18:03:19 +08:00 committed by Greg Kroah-Hartman
parent 57a1681095
commit 50f05bd114
1 changed files with 14 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/ipack/carriers/tpci200.c
View File

@ -254,7 +254,7 @@ static int tpci200_register(struct tpci200_board *tpci200)
"(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 2 !",
tpci200->info->pdev->bus->number,
tpci200->info->pdev->devfn);
goto out_disable_pci;
goto err_disable_device;
}
/* Request IO ID INT space (Bar 3) */
@ -266,7 +266,7 @@ static int tpci200_register(struct tpci200_board *tpci200)
"(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 3 !",
tpci200->info->pdev->bus->number,
tpci200->info->pdev->devfn);
goto out_release_ip_space;
goto err_ip_interface_bar;
}
/* Request MEM8 space (Bar 5) */
@ -277,7 +277,7 @@ static int tpci200_register(struct tpci200_board *tpci200)
"(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 5!",
tpci200->info->pdev->bus->number,
tpci200->info->pdev->devfn);
goto out_release_ioid_int_space;
goto err_io_id_int_spaces_bar;
}
/* Request MEM16 space (Bar 4) */
@ -288,7 +288,7 @@ static int tpci200_register(struct tpci200_board *tpci200)
"(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 4!",
tpci200->info->pdev->bus->number,
tpci200->info->pdev->devfn);
goto out_release_mem8_space;
goto err_mem8_space_bar;
}
/* Map internal tpci200 driver user space */
@ -302,7 +302,7 @@ static int tpci200_register(struct tpci200_board *tpci200)
tpci200->info->pdev->bus->number,
tpci200->info->pdev->devfn);
res = -ENOMEM;
goto out_release_mem8_space;
goto err_mem16_space_bar;
}
/* Initialize lock that protects interface_regs */
@ -341,18 +341,22 @@ static int tpci200_register(struct tpci200_board *tpci200)
"(bn 0x%X, sn 0x%X) unable to register IRQ !",
tpci200->info->pdev->bus->number,
tpci200->info->pdev->devfn);
goto out_release_ioid_int_space;
goto err_interface_regs;
}
return 0;
out_release_mem8_space:
err_interface_regs:
pci_iounmap(tpci200->info->pdev, tpci200->info->interface_regs);
err_mem16_space_bar:
pci_release_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR);
err_mem8_space_bar:
pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR);
out_release_ioid_int_space:
err_io_id_int_spaces_bar:
pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR);
out_release_ip_space:
err_ip_interface_bar:
pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR);
out_disable_pci:
err_disable_device:
pci_disable_device(tpci200->info->pdev);
return res;
}