From: Julia Lawall <ju...@diku.dk> Use kmemdup when some other buffer is immediately copied into the allocated region.
A simplified version of the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression from,to,size,flag; statement S; @@ - to = \(kmalloc\|kzalloc\)(size,flag); + to = kmemdup(from,size,flag); if (to==NULL || ...) S - memcpy(to, from, size); // </smpl> Signed-off-by: Julia Lawall <ju...@diku.dk> --- drivers/gpu/drm/nouveau/nouveau_grctx.c | 6 ++---- drivers/gpu/drm/radeon/radeon_bios.c | 3 +-- 2 files changed, 3 insertions(+), 6 deletions(-) diff -u -p a/drivers/gpu/drm/nouveau/nouveau_grctx.c b/drivers/gpu/drm/nouveau/nouveau_grctx.c --- a/drivers/gpu/drm/nouveau/nouveau_grctx.c +++ b/drivers/gpu/drm/nouveau/nouveau_grctx.c @@ -68,13 +68,12 @@ nouveau_grctx_prog_load(struct drm_devic return ret; } - pgraph->ctxprog = kmalloc(fw->size, GFP_KERNEL); + pgraph->ctxprog = kmemdup(fw->data, fw->size, GFP_KERNEL); if (!pgraph->ctxprog) { NV_ERROR(dev, "OOM copying ctxprog\n"); release_firmware(fw); return -ENOMEM; } - memcpy(pgraph->ctxprog, fw->data, fw->size); cp = pgraph->ctxprog; if (le32_to_cpu(cp->signature) != 0x5043564e || @@ -97,14 +96,13 @@ nouveau_grctx_prog_load(struct drm_devic return ret; } - pgraph->ctxvals = kmalloc(fw->size, GFP_KERNEL); + pgraph->ctxvals = kmemdup(fw->data, fw->size, GFP_KERNEL); if (!pgraph->ctxvals) { NV_ERROR(dev, "OOM copying ctxvals\n"); release_firmware(fw); nouveau_grctx_fini(dev); return -ENOMEM; } - memcpy(pgraph->ctxvals, fw->data, fw->size); cv = (void *)pgraph->ctxvals; if (le32_to_cpu(cv->signature) != 0x5643564e || diff -u -p a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c --- a/drivers/gpu/drm/radeon/radeon_bios.c +++ b/drivers/gpu/drm/radeon/radeon_bios.c @@ -85,12 +85,11 @@ static bool radeon_read_bios(struct rade pci_unmap_rom(rdev->pdev, bios); return false; } - rdev->bios = kmalloc(size, GFP_KERNEL); + rdev->bios = kmemdup(bios, size, GFP_KERNEL); if (rdev->bios == NULL) { pci_unmap_rom(rdev->pdev, bios); return false; } - memcpy(rdev->bios, bios, size); pci_unmap_rom(rdev->pdev, bios); return true; } _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
