On 6/3/22 15:17, Hannes Reinecke wrote:
On 6/3/22 00:51, Tyler Erickson wrote:
The concurrent positioning ranges log is not a fixed size and may depend on how many ranges are supported by the device. This patch uses the size reported in the GPL directory to determine the number of pages supported by the device before attempting to read this log page.
This resolves this error from the dmesg output: ata6.00: Read log 0x47 page 0x00 failed, Emask 0x1
Cc: stable@vger.kernel.org Fixes: fe22e1c2f705 ("libata: support concurrent positioning ranges log") Signed-off-by: Tyler Erickson tyler.erickson@seagate.com Reviewed-by: Muhammad Ahmad muhammad.ahmad@seagate.com Tested-by: Michael English michael.english@seagate.com
drivers/ata/libata-core.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 40e816419f48..3ea10f72cb70 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -2010,16 +2010,16 @@ unsigned int ata_read_log_page(struct ata_device *dev, u8 log, return err_mask; } -static bool ata_log_supported(struct ata_device *dev, u8 log) +static int ata_log_supported(struct ata_device *dev, u8 log) { struct ata_port *ap = dev->link->ap; if (dev->horkage & ATA_HORKAGE_NO_LOG_DIR)
return false;
return 0;if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1))
return false;- return get_unaligned_le16(&ap->sector_buf[log * 2]) ? true : false;
return 0;- return get_unaligned_le16(&ap->sector_buf[log * 2]); }
Maybe we should change to name of the function here; 'ata_log_supported()' suggests a bool return.
ata_check_log_page() ?
static bool ata_identify_page_supported(struct ata_device *dev, u8 page) @@ -2455,15 +2455,20 @@ static void ata_dev_config_cpr(struct ata_device *dev) struct ata_cpr_log *cpr_log = NULL; u8 *desc, *buf = NULL;
- if (ata_id_major_version(dev->id) < 11 ||
!ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES))
- if (ata_id_major_version(dev->id) < 11)
goto out;- buf_len = ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES);
- if (buf_len == 0) goto out;
/* * Read the concurrent positioning ranges log (0x47). We can have at
* most 255 32B range descriptors plus a 64B header.
* most 255 32B range descriptors plus a 64B header. This log varies in* size, so use the size reported in the GPL directory. Reading beyond* the supported length will result in an error.
- buf_len = (64 + 255 * 32 + 511) & ~511;
- buf_len <<= 9; buf = kzalloc(buf_len, GFP_KERNEL); if (!buf) goto out;
I don't get it. You just returned the actual length of the log page from the previous function. Why do you need to calculate the length here?
Calculate ? This is only converting from 512B sectors to bytes. The calculation was mine, a gross error :) This is what this patch is fixing.
Cheers,
Hannes