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[PATCH] ahci: cosmetic changes to ahci_start/stop_engine()

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* fascist-format comments according to comment style used in libata
  core layer.

* if() -> if ()

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Zhao, Forrest <forrest.zhao@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-07-26 15:59:25 +09:00 committed by Jeff Garzik
parent 254950cd56
commit d8fcd116d2
1 changed files with 9 additions and 18 deletions
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27
drivers/scsi/ahci.c
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@ -410,30 +410,23 @@ static int ahci_start_engine(void __iomem *port_mmio)
{
u32 tmp;
/*
* Get current status
*/
/* get current status */
tmp = readl(port_mmio + PORT_CMD);
/*
* AHCI rev 1.1 section 10.3.1:
/* AHCI rev 1.1 section 10.3.1:
* Software shall not set PxCMD.ST to '1' until it verifies
* that PxCMD.CR is '0' and has set PxCMD.FRE to '1'
*/
if ((tmp & PORT_CMD_FIS_RX) == 0)
return -EPERM;
/*
* wait for engine to become idle.
*/
/* wait for engine to become idle */
tmp = ata_wait_register(port_mmio + PORT_CMD,
PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1,500);
if(tmp & PORT_CMD_LIST_ON)
if (tmp & PORT_CMD_LIST_ON)
return -EBUSY;
/*
* Start DMA
*/
/* start DMA */
tmp |= PORT_CMD_START;
writel(tmp, port_mmio + PORT_CMD);
readl(port_mmio + PORT_CMD); /* flush */
@ -447,20 +440,18 @@ static int ahci_stop_engine(void __iomem *port_mmio)
tmp = readl(port_mmio + PORT_CMD);
/* Check if the HBA is idle */
/* check if the HBA is idle */
if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
return 0;
/* Setting HBA to idle */
/* setting HBA to idle */
tmp &= ~PORT_CMD_START;
writel(tmp, port_mmio + PORT_CMD);
/* wait for engine to stop. This could be
* as long as 500 msec
*/
/* wait for engine to stop. This could be as long as 500 msec */
tmp = ata_wait_register(port_mmio + PORT_CMD,
PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
if(tmp & PORT_CMD_LIST_ON)
if (tmp & PORT_CMD_LIST_ON)
return -EIO;
return 0;