From 4ff277f9e42fa16314045bd124a61519286094c0 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Wed, 28 Oct 2009 22:55:33 +0100 Subject: [PATCH] PM / Hibernate: Fix error handling in save_image() There are too many retval variables in save_image(). Thus error return value from snapshot_read_next() may be ignored and only part of the snapshot (successfully) written. Remove 'error' variable, invert the condition in the do-while loop and convert the loop to use only 'ret' variable. Switch the rest of the function to consider only 'ret'. Also make sure we end printed line by \n if an error occurs. Signed-off-by: Jiri Slaby Acked-by: Pavel Machek Signed-off-by: Rafael J. Wysocki --- kernel/power/swap.c | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) diff --git a/kernel/power/swap.c b/kernel/power/swap.c index a4388624ed98..afa052b61161 100644 --- a/kernel/power/swap.c +++ b/kernel/power/swap.c @@ -314,7 +314,6 @@ static int save_image(struct swap_map_handle *handle, { unsigned int m; int ret; - int error = 0; int nr_pages; int err2; struct bio *bio; @@ -329,26 +328,27 @@ static int save_image(struct swap_map_handle *handle, nr_pages = 0; bio = NULL; do_gettimeofday(&start); - do { + while (1) { ret = snapshot_read_next(snapshot, PAGE_SIZE); - if (ret > 0) { - error = swap_write_page(handle, data_of(*snapshot), - &bio); - if (error) - break; - if (!(nr_pages % m)) - printk("\b\b\b\b%3d%%", nr_pages / m); - nr_pages++; - } - } while (ret > 0); + if (ret <= 0) + break; + ret = swap_write_page(handle, data_of(*snapshot), &bio); + if (ret) + break; + if (!(nr_pages % m)) + printk("\b\b\b\b%3d%%", nr_pages / m); + nr_pages++; + } err2 = wait_on_bio_chain(&bio); do_gettimeofday(&stop); - if (!error) - error = err2; - if (!error) + if (!ret) + ret = err2; + if (!ret) printk("\b\b\b\bdone\n"); + else + printk("\n"); swsusp_show_speed(&start, &stop, nr_to_write, "Wrote"); - return error; + return ret; } /** -- 2.20.1