Hi
This patch helps prevent an oops on 2.6.18-rt3,
when my usb usx2y soundcard disconnects.
Physically disconnects or "rmmod uhci_hc" both oops 1in7.
With this patch still no oops after > 1000 disconnects.
Please apply/comment.
thanks,
Karsten
===
Reset file->f_op in snd_card_file_remove()
When passing here in response to an usb disconnect,
file->f_op has been replaced with a kmalloc()ed version,
that would only allow releases.
It will be free()ed later on in snd_card_free().
Here it happened sometimes, that the free()ed, not NULLed file->f_op
caused an oops in module_put() called by fops_put() still later on.
Signed-off-by: Karsten Wiese <annabellesgarden@xxxxxxxx>
--- rt3/sound/core/init.c 2006-09-23 20:03:18.000000000 +0200
+++ rt3-kw/sound/core/init.c 2006-09-27 20:44:54.000000000 +0200
@@ -722,6 +722,7 @@ int snd_card_file_remove(struct snd_card
mfile = card->files;
while (mfile) {
if (mfile->file == file) {
+ file->f_op = NULL;
if (pfile)
pfile->next = mfile->next;
else
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