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Subject[PATCH v2 2/2] ubi: block: improve error log before setting dev_name in ubiblock_create()
Date
From: Li Nan <linan122@huawei.com>

dev_err() outputs dev_name using 'kobject_name(&dev->kobj)' to notify
users about the device encountering an error. However, before initializing
device name, it will print error message with 'null' instead of the actual
device name, like this:
block (null): ...
~~~~~~

This log is not clear enough to provide the necessary context for
identifying the device. Therefore, in the error handling path of
blk_mq_alloc_tag_set() and idr_alloc(), where device name has not been
init yet, using pr_err() instead of dev_err() to print more details.
The improved error log is:
ubiblock0_0: ...

Signed-off-by: Li Nan <linan122@huawei.com>
---
drivers/mtd/ubi/block.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index 3b61196d387b..bf7308e8ec2f 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -390,7 +390,8 @@ int ubiblock_create(struct ubi_volume_info *vi)

ret = blk_mq_alloc_tag_set(&dev->tag_set);
if (ret) {
- dev_err(disk_to_dev(gd), "blk_mq_alloc_tag_set failed");
+ pr_err("ubiblock%d_%d: blk_mq_alloc_tag_set failed\n",
+ dev->ubi_num, dev->vol_id);
goto out_free_dev;
}

@@ -407,8 +408,8 @@ int ubiblock_create(struct ubi_volume_info *vi)
gd->minors = 1;
gd->first_minor = idr_alloc(&ubiblock_minor_idr, dev, 0, 0, GFP_KERNEL);
if (gd->first_minor < 0) {
- dev_err(disk_to_dev(gd),
- "block: dynamic minor allocation failed");
+ pr_err("ubiblock%d_%d: block: dynamic minor allocation failed\n",
+ dev->ubi_num, dev->vol_id);
ret = -ENODEV;
goto out_cleanup_disk;
}
--
2.39.2

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