From 80b0cd0fb97ec3c02b0f2c4dc26fe3e8be94dc01 Mon Sep 17 00:00:00 2001 From: Luben Tuikov Date: Tue, 13 Apr 2021 08:31:59 -0400 Subject: [PATCH] drm/amdgpu: Fix a bug in checking the result of reserve page Fix if (ret) --> if (!ret), a bug, for "retire_page", which caused the kernel to recall the method with *pos == end of file, and that bounced back with error. On the first run, we advanced *pos, but returned 0 back to fs layer, also a bug. Fix the logic of the check of the result of amdgpu_reserve_page_direct()--it is 0 on success, and non-zero on error, not the other way around. This patch fixes this bug. Cc: Alexander Deucher Cc: John Clements Cc: Hawking Zhang Signed-off-by: Luben Tuikov Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c index 9041453..3ca6b51 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c @@ -114,7 +114,7 @@ static int amdgpu_reserve_page_direct(struct amdgpu_device *adev, uint64_t addre if (amdgpu_ras_check_bad_page(adev, address)) { dev_warn(adev->dev, - "RAS WARN: 0x%llx has been marked as bad page!\n", + "RAS WARN: 0x%llx has already been marked as bad page!\n", address); return 0; } @@ -228,7 +228,6 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f, return -EINVAL; if (op != -1) { - if (op == 3) { if (sscanf(str, "%*s %llx", &address) != 1) return -EINVAL; @@ -364,11 +363,9 @@ static ssize_t amdgpu_ras_debugfs_ctrl_write(struct file *f, const char __user * if (ret) return -EINVAL; - if (data.op == 3) - { + if (data.op == 3) { ret = amdgpu_reserve_page_direct(adev, data.inject.address); - - if (ret) + if (!ret) return size; else return ret; -- 2.7.4