Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[safe/jmp/linux-2.6] / drivers / md / raid5.c

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 20e4840..15348c3 100644 (file)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1527,7 +1527,7 @@ static void raid5_end_read_request(struct bio * bi, int error)
 
                clear_bit(R5_UPTODATE, &sh->dev[i].flags);
                atomic_inc(&rdev->read_errors);
-               if (conf->mddev->degraded)
+               if (conf->mddev->degraded >= conf->max_degraded)
                        printk_rl(KERN_WARNING
                                  "raid5:%s: read error not correctable "
                                  "(sector %llu on %s).\n",
@@ -1650,7 +1650,7 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
                                     int previous, int *dd_idx,
                                     struct stripe_head *sh)
 {
-       sector_t stripe;
+       sector_t stripe, stripe2;
        sector_t chunk_number;
        unsigned int chunk_offset;
        int pd_idx, qd_idx;
@@ -1677,7 +1677,7 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
         */
        stripe = chunk_number;
        *dd_idx = sector_div(stripe, data_disks);
-
+       stripe2 = stripe;
        /*
         * Select the parity disk based on the user selected algorithm.
         */
@@ -1689,21 +1689,21 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
        case 5:
                switch (algorithm) {
                case ALGORITHM_LEFT_ASYMMETRIC:
-                       pd_idx = data_disks - stripe % raid_disks;
+                       pd_idx = data_disks - sector_div(stripe2, raid_disks);
                        if (*dd_idx >= pd_idx)
                                (*dd_idx)++;
                        break;
                case ALGORITHM_RIGHT_ASYMMETRIC:
-                       pd_idx = stripe % raid_disks;
+                       pd_idx = sector_div(stripe2, raid_disks);
                        if (*dd_idx >= pd_idx)
                                (*dd_idx)++;
                        break;
                case ALGORITHM_LEFT_SYMMETRIC:
-                       pd_idx = data_disks - stripe % raid_disks;
+                       pd_idx = data_disks - sector_div(stripe2, raid_disks);
                        *dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;
                        break;
                case ALGORITHM_RIGHT_SYMMETRIC:
-                       pd_idx = stripe % raid_disks;
+                       pd_idx = sector_div(stripe2, raid_disks);
                        *dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;
                        break;
                case ALGORITHM_PARITY_0:
@@ -1723,7 +1723,7 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
 
                switch (algorithm) {
                case ALGORITHM_LEFT_ASYMMETRIC:
-                       pd_idx = raid_disks - 1 - (stripe % raid_disks);
+                       pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);
                        qd_idx = pd_idx + 1;
                        if (pd_idx == raid_disks-1) {
                                (*dd_idx)++;    /* Q D D D P */
@@ -1732,7 +1732,7 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
                                (*dd_idx) += 2; /* D D P Q D */
                        break;
                case ALGORITHM_RIGHT_ASYMMETRIC:
-                       pd_idx = stripe % raid_disks;
+                       pd_idx = sector_div(stripe2, raid_disks);
                        qd_idx = pd_idx + 1;
                        if (pd_idx == raid_disks-1) {
                                (*dd_idx)++;    /* Q D D D P */
@@ -1741,12 +1741,12 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
                                (*dd_idx) += 2; /* D D P Q D */
                        break;
                case ALGORITHM_LEFT_SYMMETRIC:
-                       pd_idx = raid_disks - 1 - (stripe % raid_disks);
+                       pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);
                        qd_idx = (pd_idx + 1) % raid_disks;
                        *dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;
                        break;
                case ALGORITHM_RIGHT_SYMMETRIC:
-                       pd_idx = stripe % raid_disks;
+                       pd_idx = sector_div(stripe2, raid_disks);
                        qd_idx = (pd_idx + 1) % raid_disks;
                        *dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;
                        break;
@@ -1765,7 +1765,7 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
                        /* Exactly the same as RIGHT_ASYMMETRIC, but or
                         * of blocks for computing Q is different.
                         */
-                       pd_idx = stripe % raid_disks;
+                       pd_idx = sector_div(stripe2, raid_disks);
                        qd_idx = pd_idx + 1;
                        if (pd_idx == raid_disks-1) {
                                (*dd_idx)++;    /* Q D D D P */
@@ -1780,7 +1780,8 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
                         * D D D P Q  rather than
                         * Q D D D P
                         */
-                       pd_idx = raid_disks - 1 - ((stripe + 1) % raid_disks);
+                       stripe2 += 1;
+                       pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);
                        qd_idx = pd_idx + 1;
                        if (pd_idx == raid_disks-1) {
                                (*dd_idx)++;    /* Q D D D P */
@@ -1792,7 +1793,7 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
 
                case ALGORITHM_ROTATING_N_CONTINUE:
                        /* Same as left_symmetric but Q is before P */
-                       pd_idx = raid_disks - 1 - (stripe % raid_disks);
+                       pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);
                        qd_idx = (pd_idx + raid_disks - 1) % raid_disks;
                        *dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;
                        ddf_layout = 1;
@@ -1800,27 +1801,27 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
 
                case ALGORITHM_LEFT_ASYMMETRIC_6:
                        /* RAID5 left_asymmetric, with Q on last device */
-                       pd_idx = data_disks - stripe % (raid_disks-1);
+                       pd_idx = data_disks - sector_div(stripe2, raid_disks-1);
                        if (*dd_idx >= pd_idx)
                                (*dd_idx)++;
                        qd_idx = raid_disks - 1;
                        break;
 
                case ALGORITHM_RIGHT_ASYMMETRIC_6:
-                       pd_idx = stripe % (raid_disks-1);
+                       pd_idx = sector_div(stripe2, raid_disks-1);
                        if (*dd_idx >= pd_idx)
                                (*dd_idx)++;
                        qd_idx = raid_disks - 1;
                        break;
 
                case ALGORITHM_LEFT_SYMMETRIC_6:
-                       pd_idx = data_disks - stripe % (raid_disks-1);
+                       pd_idx = data_disks - sector_div(stripe2, raid_disks-1);
                        *dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);
                        qd_idx = raid_disks - 1;
                        break;
 
                case ALGORITHM_RIGHT_SYMMETRIC_6:
-                       pd_idx = stripe % (raid_disks-1);
+                       pd_idx = sector_div(stripe2, raid_disks-1);
                        *dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);
                        qd_idx = raid_disks - 1;
                        break;