https://github.com/torvalds/linux
Revision 32c356d76d7e13dcd0675189d8e9c64ef66aa561 authored by James Bottomley on 19 August 2008, 22:58:13 UTC, committed by James Bottomley on 23 October 2008, 16:41:16 UTC
On Tue, 12 Aug 2008 15:08:14 +0200 Giuliano Pochini <pochini@shiny.it> wrote: > Fujitsu magneto-optical drive, Adaptec 29160 and > Linux Jay 2.6.26 #7 SMP Sun Aug 10 18:34:22 CEST 2008 ppc 7455, altivec supported PowerMac3,6 GNU/Linux > > When I insert a disk and I mount it, scsi_test_unit_ready() is called and > the do-while loop gets sshdr->sense_key == UNIT_ATTENTION in the first > cycle and 0 in the second one. So the if below misses the UNIT_ATTENTION > and sdev->changed = 1 is not executed. At this point bad things can > happen... I'm not sure how to fix this. Any clue ? The problem is essentially caused by us eating UNIT_ATTENTION conditions in scsi_test_unit_ready(). Fix by updating the ->changed flag when this happens if the media is removable. [pochini@shiny.it: updates to tidy up patch] Signed-off-by: Giuliano Pochini <pochini@shiny.it> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
1 parent 26e9a39
Tip revision: 32c356d76d7e13dcd0675189d8e9c64ef66aa561 authored by James Bottomley on 19 August 2008, 22:58:13 UTC
[SCSI] fix removable device inability to detect disk changes
[SCSI] fix removable device inability to detect disk changes
Tip revision: 32c356d
crc32defs.h
/*
* There are multiple 16-bit CRC polynomials in common use, but this is
* *the* standard CRC-32 polynomial, first popularized by Ethernet.
* x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x^1+x^0
*/
#define CRCPOLY_LE 0xedb88320
#define CRCPOLY_BE 0x04c11db7
/* How many bits at a time to use. Requires a table of 4<<CRC_xx_BITS bytes. */
/* For less performance-sensitive, use 4 */
#ifndef CRC_LE_BITS
# define CRC_LE_BITS 8
#endif
#ifndef CRC_BE_BITS
# define CRC_BE_BITS 8
#endif
/*
* Little-endian CRC computation. Used with serial bit streams sent
* lsbit-first. Be sure to use cpu_to_le32() to append the computed CRC.
*/
#if CRC_LE_BITS > 8 || CRC_LE_BITS < 1 || CRC_LE_BITS & CRC_LE_BITS-1
# error CRC_LE_BITS must be a power of 2 between 1 and 8
#endif
/*
* Big-endian CRC computation. Used with serial bit streams sent
* msbit-first. Be sure to use cpu_to_be32() to append the computed CRC.
*/
#if CRC_BE_BITS > 8 || CRC_BE_BITS < 1 || CRC_BE_BITS & CRC_BE_BITS-1
# error CRC_BE_BITS must be a power of 2 between 1 and 8
#endif
Computing file changes ...