[PATCH 05/15] um/drivers/ubd_kern: add error handling support for add_disk()
From: Luis Chamberlain <mcgrof@kernel.org>
Date: 2021-08-30 22:10:57
Also in:
linux-m68k, linux-um, lkml
Subsystem:
the rest, user-mode linux (uml) · Maintainers:
Linus Torvalds, Richard Weinberger, Anton Ivanov, Johannes Berg
We never checked for errors on add_disk() as this function returned void. Now that this is fixed, use the shiny new error handling. ubd_disk_register() never returned an error, so just fix that now and let the caller handle the error condition. Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> --- arch/um/drivers/ubd_kern.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index cd9dc0556e91..81045c199c30 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c@@ -854,8 +854,8 @@ static const struct attribute_group *ubd_attr_groups[] = { NULL, }; -static void ubd_disk_register(int major, u64 size, int unit, - struct gendisk *disk) +static int ubd_disk_register(int major, u64 size, int unit, + struct gendisk *disk) { disk->major = major; disk->first_minor = unit << UBD_SHIFT;
@@ -872,7 +872,7 @@ static void ubd_disk_register(int major, u64 size, int unit, disk->private_data = &ubd_devs[unit]; disk->queue = ubd_devs[unit].queue; - device_add_disk(&ubd_devs[unit].pdev.dev, disk, ubd_attr_groups); + return device_add_disk(&ubd_devs[unit].pdev.dev, disk, ubd_attr_groups); } #define ROUND_BLOCK(n) ((n + (SECTOR_SIZE - 1)) & (-SECTOR_SIZE))
@@ -919,10 +919,15 @@ static int ubd_add(int n, char **error_out) blk_queue_write_cache(ubd_dev->queue, true, false); blk_queue_max_segments(ubd_dev->queue, MAX_SG); blk_queue_segment_boundary(ubd_dev->queue, PAGE_SIZE - 1); - ubd_disk_register(UBD_MAJOR, ubd_dev->size, n, disk); + err = ubd_disk_register(UBD_MAJOR, ubd_dev->size, n, disk); + if (err) + goto out_cleanup_disk; + ubd_gendisk[n] = disk; return 0; +out_cleanup_disk: + blk_cleanup_disk(disk); out_cleanup_tags: blk_mq_free_tag_set(&ubd_dev->tag_set); out:
--
2.30.2