[SCSI] st: fix enlarge_buffer
This patch removes a bug in enlarge_buffer() that can make a read or write fail under special conditions. After changing TRY_DIRECT_IO to 0 and ST_MAX_SG to 32 in st_options.h, a program that writes a first block of 128k and than a second bigger block (e.g. 256k) fails. The second write returns errno EOVERFLOW, as enlarge_buffer() checks the sg list and detects that it already is full. As enlarge_buffer uses different page allocation orders depending on the size of the buffer needed, the check does not make sense. Signed-off-by: NBodo Stroesser <bstroesser@ts.fujitsu.com> Acked-by: NKai Mäkisara <kai.makisara@kolumbus.fi> Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>
Showing
想要评论请 注册 或 登录