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[SCSI] Clean up scsi_add_lun a bit

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This patch tidies up scsi_add_lun a bit.  I rewrote the kerneldoc to match
the actual parameters, moved the check for RBC and MMC REPORT_LUN devices
away from the switch(), changed the setup of sdev->type to account for
BLIST_ISROM, moved the check for BLIST_NO_ULD_ATTACH further down in
the function, removed a bogus comment and fixed some whitespace issues.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Matthew Wilcox 2007-07-11 12:54:55 -06:00 committed by James Bottomley
parent 0cba35e42c
commit 6d877688ef
1 changed files with 26 additions and 38 deletions
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64
drivers/scsi/scsi_scan.c
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@ -694,16 +694,14 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result,
/**
* scsi_add_lun - allocate and fully initialze a scsi_device
* @sdevscan: holds information to be stored in the new scsi_device
* @sdevnew: store the address of the newly allocated scsi_device
* @sdev: holds information to be stored in the new scsi_device
* @inq_result: holds the result of a previous INQUIRY to the LUN
* @bflags: black/white list flag
* @async: 1 if this device is being scanned asynchronously
*
* Description:
* Allocate and initialize a scsi_device matching sdevscan. Optionally
* set fields based on values in *@bflags. If @sdevnew is not
* NULL, store the address of the new scsi_device in *@sdevnew (needed
* when scanning a particular LUN).
* Initialize the scsi_device @sdev. Optionally set fields based
* on values in *@bflags.
*
* Return:
* SCSI_SCAN_NO_RESPONSE: could not allocate or setup a scsi_device
@ -743,25 +741,15 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
sdev->rev = (char *) (sdev->inquiry + 32);
if (*bflags & BLIST_ISROM) {
/*
* It would be better to modify sdev->type, and set
* sdev->removable; this can now be done since
* print_inquiry has gone away.
*/
inq_result[0] = TYPE_ROM;
inq_result[1] |= 0x80; /* removable */
} else if (*bflags & BLIST_NO_ULD_ATTACH)
sdev->no_uld_attach = 1;
sdev->type = TYPE_ROM;
sdev->removable = 1;
} else {
sdev->type = (inq_result[0] & 0x1f);
sdev->removable = (inq_result[1] & 0x80) >> 7;
}
switch (sdev->type = (inq_result[0] & 0x1f)) {
switch (sdev->type) {
case TYPE_RBC:
/* RBC devices can return SCSI-3 compliance and yet
* still not support REPORT LUNS, so make them act as
* BLIST_NOREPORTLUN unless BLIST_REPORTLUN2 is
* specifically set */
if ((*bflags & BLIST_REPORTLUN2) == 0)
*bflags |= BLIST_NOREPORTLUN;
/* fall through */
case TYPE_TAPE:
case TYPE_DISK:
case TYPE_PRINTER:
@ -775,13 +763,6 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
sdev->writeable = 1;
break;
case TYPE_ROM:
/* MMC devices can return SCSI-3 compliance and yet
* still not support REPORT LUNS, so make them act as
* BLIST_NOREPORTLUN unless BLIST_REPORTLUN2 is
* specifically set */
if ((*bflags & BLIST_REPORTLUN2) == 0)
*bflags |= BLIST_NOREPORTLUN;
/* fall through */
case TYPE_WORM:
sdev->writeable = 0;
break;
@ -789,6 +770,15 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
printk(KERN_INFO "scsi: unknown device type %d\n", sdev->type);
}
if (sdev->type == TYPE_RBC || sdev->type == TYPE_ROM) {
/* RBC and MMC devices can return SCSI-3 compliance and yet
* still not support REPORT LUNS, so make them act as
* BLIST_NOREPORTLUN unless BLIST_REPORTLUN2 is
* specifically set */
if ((*bflags & BLIST_REPORTLUN2) == 0)
*bflags |= BLIST_NOREPORTLUN;
}
/*
* For a peripheral qualifier (PQ) value of 1 (001b), the SCSI
* spec says: The device server is capable of supporting the
@ -806,12 +796,11 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
*/
sdev->inq_periph_qual = (inq_result[0] >> 5) & 7;
sdev->removable = (0x80 & inq_result[1]) >> 7;
sdev->lockable = sdev->removable;
sdev->soft_reset = (inq_result[7] & 1) && ((inq_result[3] & 7) == 2);
if (sdev->scsi_level >= SCSI_3 || (sdev->inquiry_len > 56 &&
inq_result[56] & 0x04))
if (sdev->scsi_level >= SCSI_3 ||
(sdev->inquiry_len > 56 && inq_result[56] & 0x04))
sdev->ppr = 1;
if (inq_result[7] & 0x60)
sdev->wdtr = 1;
@ -824,13 +813,10 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
sdev->inq_periph_qual, inq_result[2] & 0x07,
(inq_result[3] & 0x0f) == 1 ? " CCS" : "");
/*
* End sysfs code.
*/
if ((sdev->scsi_level >= SCSI_2) && (inq_result[7] & 2) &&
!(*bflags & BLIST_NOTQ))
sdev->tagged_supported = 1;
/*
* Some devices (Texel CD ROM drives) have handshaking problems
* when used with the Seagate controllers. borken is initialized
@ -839,6 +825,9 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
if ((*bflags & BLIST_BORKEN) == 0)
sdev->borken = 0;
if (*bflags & BLIST_NO_ULD_ATTACH)
sdev->no_uld_attach = 1;
/*
* Apparently some really broken devices (contrary to the SCSI
* standards) need to be selected without asserting ATN
@ -863,7 +852,6 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
if (*bflags & BLIST_SINGLELUN)
sdev->single_lun = 1;
sdev->use_10_for_rw = 1;
if (*bflags & BLIST_MS_SKIP_PAGE_08)