[MTD] [NAND] nandsim: bugfix in initialization

[powerpc.git] / drivers / mtd / nand / nandsim.c

diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index 205df0f..10490b4 100644 (file)
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -511,7 +511,7 @@ static int init_nandsim(struct mtd_info *mtd)
        }
 
        if (ns->options & OPT_SMALLPAGE) {
-               if (ns->geom.totsz < (64 << 20)) {
+               if (ns->geom.totsz < (32 << 20)) {
                        ns->geom.pgaddrbytes  = 3;
                        ns->geom.secaddrbytes = 2;
                } else {
@@ -1272,7 +1272,13 @@ static int prog_page(struct nandsim *ns, int num)
        mypage = NS_GET_PAGE(ns);
        if (mypage->byte == NULL) {
                NS_DBG("prog_page: allocating page %d\n", ns->regs.row);
-               mypage->byte = kmalloc(ns->geom.pgszoob, GFP_KERNEL);
+               /*
+                * We allocate memory with GFP_NOFS because a flash FS may
+                * utilize this. If it is holding an FS lock, then gets here,
+                * then kmalloc runs writeback which goes to the FS again
+                * and deadlocks. This was seen in practice.
+                */
+               mypage->byte = kmalloc(ns->geom.pgszoob, GFP_NOFS);
                if (mypage->byte == NULL) {
                        NS_ERR("prog_page: error allocating memory for page %d\n", ns->regs.row);
                        return -1;