Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...

[cascardo/linux.git] / drivers / ata / libata-core.c

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c19734d..943cc8b 100644 (file)
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4224,8 +4224,10 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
        { "PIONEER DVD-RW  DVR-216D",   NULL,   ATA_HORKAGE_NOSETXFER },
 
        /* devices that don't properly handle queued TRIM commands */
-       { "Micron_M500*",               NULL,   ATA_HORKAGE_NO_NCQ_TRIM, },
-       { "Crucial_CT???M500SSD*",      NULL,   ATA_HORKAGE_NO_NCQ_TRIM, },
+       { "Micron_M500*",               "MU0[1-4]*",    ATA_HORKAGE_NO_NCQ_TRIM, },
+       { "Crucial_CT???M500SSD*",      "MU0[1-4]*",    ATA_HORKAGE_NO_NCQ_TRIM, },
+       { "Micron_M550*",               NULL,           ATA_HORKAGE_NO_NCQ_TRIM, },
+       { "Crucial_CT???M550SSD*",      NULL,           ATA_HORKAGE_NO_NCQ_TRIM, },
 
        /*
         * Some WD SATA-I drives spin up and down erratically when the link
@@ -4792,21 +4794,26 @@ void swap_buf_le16(u16 *buf, unsigned int buf_words)
 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
 {
        struct ata_queued_cmd *qc = NULL;
-       unsigned int i;
+       unsigned int i, tag;
 
        /* no command while frozen */
        if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
                return NULL;
 
-       /* the last tag is reserved for internal command. */
-       for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
-               if (!test_and_set_bit(i, &ap->qc_allocated)) {
-                       qc = __ata_qc_from_tag(ap, i);
+       for (i = 0; i < ATA_MAX_QUEUE; i++) {
+               tag = (i + ap->last_tag + 1) % ATA_MAX_QUEUE;
+
+               /* the last tag is reserved for internal command. */
+               if (tag == ATA_TAG_INTERNAL)
+                       continue;
+
+               if (!test_and_set_bit(tag, &ap->qc_allocated)) {
+                       qc = __ata_qc_from_tag(ap, tag);
+                       qc->tag = tag;
+                       ap->last_tag = tag;
                        break;
                }
-
-       if (qc)
-               qc->tag = i;
+       }
 
        return qc;
 }