[PATCH 4/9] video: Add check for return value of ioremap() in cirrusfb_pci_register()
From: SF Markus Elfring <hidden>
Date: 2015-01-19 18:35:16
Also in:
linux-fbdev, lkml
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
From: Markus Elfring <redacted> Date: Mon, 19 Jan 2015 13:18:50 +0100 The return value from a call of the ioremap() function was not checked by the implementation of the cirrusfb_pci_register() function. Let us complete the corresponding error detection and exception handling at this source code place. Signed-off-by: Markus Elfring <redacted> --- drivers/video/fbdev/cirrusfb.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/video/fbdev/cirrusfb.c b/drivers/video/fbdev/cirrusfb.c
index d8b3359..aa4050c 100644
--- a/drivers/video/fbdev/cirrusfb.c
+++ b/drivers/video/fbdev/cirrusfb.c@@ -2111,6 +2111,10 @@ static int cirrusfb_pci_register(struct pci_dev *pdev, /* FIXME: this forces VGA. alternatives? */ cinfo->regbase = NULL; cinfo->laguna_mmio = ioremap(info->fix.mmio_start, 0x1000); + if (!cinfo->laguna_mmio) { + ret = -EIO; + goto err_release_fb; + } dev_dbg(info->device, "Board address: 0x%lx, register address: 0x%lx\n", board_addr, info->fix.mmio_start);
@@ -2122,7 +2126,7 @@ static int cirrusfb_pci_register(struct pci_dev *pdev, if (ret < 0) { dev_err(info->device, "cannot reserve region 0x%lx, abort\n", board_addr); - goto err_release_fb; + goto io_unmap_laguna; } #if 0 /* if the system didn't claim this region, we would... */ if (!request_mem_region(0xA0000, 65535, "cirrusfb")) {
@@ -2163,8 +2167,9 @@ err_release_legacy: err_release_regions: #endif pci_release_regions(pdev); -err_release_fb: +io_unmap_laguna: iounmap(cinfo->laguna_mmio); +err_release_fb: framebuffer_release(info); err_out: return ret;
--
2.2.2