2.4.1

 drivers

 ide

diff -u --recursive --new-file v2.4.0/linux/drivers/ide/ide-dma.c linux/drivers/ide/ide-dma.c
--- v2.4.0/linux/drivers/ide/ide-dma.c   Tue Jan  2 16:58:45 2001
+++ linux/drivers/ide/ide-dma.c   Mon Jan 15 13:08:15 2001
@@ -226,6 +226,9 @@
       unsigned char *virt_addr = bh->b_data;
       unsigned int size = bh->b_size;
 
+      if (nents >= PRD_ENTRIES)
+         return 0;
+
       while ((bh = bh->b_reqnext) != NULL) {
          if ((virt_addr + size) != (unsigned char *) bh->b_data)
             break;
@@ -259,6 +262,9 @@
 
    HWIF(drive)->sg_nents = i = ide_build_sglist(HWIF(drive), HWGROUP(drive)->rq);
 
+   if (!i)
+      return 0;
+
    sg = HWIF(drive)->sg_table;
    while (i && sg_dma_len(sg)) {
       u32 cur_addr;
@@ -274,7 +280,7 @@
        */
 
       while (cur_len) {
-         if (++count >= PRD_ENTRIES) {
+         if (count++ >= PRD_ENTRIES) {
             printk("%s: DMA table too small\n", drive->name);
             pci_unmap_sg(HWIF(drive)->pci_dev,
                     HWIF(drive)->sg_table,