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libata: factor out a ata_identify_page_supported helper 

tj: Updated line continuation style for consistency as pointed out by
    Sergei.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Christoph Hellwig 2017-06-04 14:42:23 +02:00 committed by Tejun Heo
parent 1d51d5f390
commit a0fd2454a3
1 changed files with 32 additions and 27 deletions
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59
drivers/ata/libata-core.c
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@ -2120,6 +2120,37 @@ static bool ata_log_supported(struct ata_device *dev, u8 log)
return get_unaligned_le16(&ap->sector_buf[log * 2]) ? true : false;
}
static bool ata_identify_page_supported(struct ata_device *dev, u8 page)
{
struct ata_port *ap = dev->link->ap;
unsigned int err, i;
if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {
ata_dev_warn(dev, "ATA Identify Device Log not supported\n");
return false;
}
/*
* Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
* supported.
*/
err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf,
1);
if (err) {
ata_dev_info(dev,
"failed to get Device Identify Log Emask 0x%x\n",
err);
return false;
}
for (i = 0; i < ap->sector_buf[8]; i++) {
if (ap->sector_buf[9 + i] == page)
return true;
}
return false;
}
static int ata_do_link_spd_horkage(struct ata_device *dev)
{
struct ata_link *plink = ata_dev_phys_link(dev);
@ -2325,8 +2356,6 @@ static void ata_dev_config_zac(struct ata_device *dev)
struct ata_port *ap = dev->link->ap;
unsigned int err_mask;
u8 *identify_buf = ap->sector_buf;
int i, found = 0;
u16 log_pages;
dev->zac_zones_optimal_open = U32_MAX;
dev->zac_zones_optimal_nonseq = U32_MAX;
@ -2346,31 +2375,7 @@ static void ata_dev_config_zac(struct ata_device *dev)
if (!(dev->flags & ATA_DFLAG_ZAC))
return;
if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {
ata_dev_warn(dev, "ATA Identify Device Log not supported\n");
return;
}
/*
* Read IDENTIFY DEVICE data log, page 0, to figure out
* if page 9 is supported.
*/
err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0,
identify_buf, 1);
if (err_mask) {
ata_dev_info(dev,
"failed to get Device Identify Log Emask 0x%x\n",
err_mask);
return;
}
log_pages = identify_buf[8];
for (i = 0; i < log_pages; i++) {
if (identify_buf[9 + i] == ATA_LOG_ZONED_INFORMATION) {
found++;
break;
}
}
if (!found) {
if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) {
ata_dev_warn(dev,
"ATA Zoned Information Log not supported\n");
return;