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driver core: Convert '/' to '!' in dev_set_name()

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Commit 3ada8b7e ("block: struct device - replace bus_id with dev_name(),
dev_set_name()") deleted the code in register_disk() that changed a '/'
to a '!' in the device name when registering a disk, but dev_set_name()
does not perform this conversion.

This leads to amusing problems with disks that have '/' in their names:
for example a failure to boot with the root partition on a cciss device,
even though the kernel says it knows about the root device:

    VFS: Cannot open root device "cciss/c0d0p6" or unknown-block(0,0)
    Please append a correct "root=" boot option; here are the available partitions:
    6800        71652960 cciss/c0d0 driver: cciss
      6802               1 cciss/c0d0p2
      6805         2931831 cciss/c0d0p5
      6806        34354908 cciss/c0d0p6
    6810        71652960 cciss/c0d1 driver: cciss

Fix this by adding code to change '/' to '!' in dev_set_name() to handle
this until dev_set_name() is converted to use kobject_set_name().

Signed-off-by: Roland Dreier <[email protected]>
Acked-by: Kay Sievers <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Roland Dreier 2009-01-09 22:27:42 -08:00 • committed by Greg Kroah-Hartman
commit 7143f7a1a3
1 changed files with 6 additions and 0 deletions
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6
drivers/base/core.c
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@ -777,10 +777,16 @@ static void device_remove_class_symlinks(struct device *dev)
int dev_set_name(struct device *dev, const char *fmt, ...)
{
va_list vargs;
char *s;
va_start(vargs, fmt);
vsnprintf(dev->bus_id, sizeof(dev->bus_id), fmt, vargs);
va_end(vargs);
/* ewww... some of these buggers have / in the name... */
while ((s = strchr(dev->bus_id, '/')))
*s = '!';
return 0;
}
EXPORT_SYMBOL_GPL(dev_set_name);