From 9564df1ff3c61f41bdc54283715417ccdfb6782b Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Fri, 16 Sep 2005 19:28:15 -0700 Subject: [PATCH] [PATCH] fix pf request handling Here's the patch from http://bugzilla.kernel.org/show_bug.cgi?id=4853 It is a feeble attempt at fixing the request handling in pf, it is totally foobar right now. Signed-off-by: Jens Axboe Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/block/paride/pf.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/block/paride/pf.c b/drivers/block/paride/pf.c index 711d2f314ac3..94af920465b5 100644 --- a/drivers/block/paride/pf.c +++ b/drivers/block/paride/pf.c @@ -750,6 +750,14 @@ static int pf_ready(void) static struct request_queue *pf_queue; +static void pf_end_request(int uptodate) +{ + if (pf_req) { + end_request(pf_req, uptodate); + pf_req = NULL; + } +} + static void do_pf_request(request_queue_t * q) { if (pf_busy) @@ -765,7 +773,7 @@ repeat: pf_count = pf_req->current_nr_sectors; if (pf_block + pf_count > get_capacity(pf_req->rq_disk)) { - end_request(pf_req, 0); + pf_end_request(0); goto repeat; } @@ -780,7 +788,7 @@ repeat: pi_do_claimed(pf_current->pi, do_pf_write); else { pf_busy = 0; - end_request(pf_req, 0); + pf_end_request(0); goto repeat; } } @@ -798,9 +806,11 @@ static int pf_next_buf(void) if (!pf_count) return 1; spin_lock_irqsave(&pf_spin_lock, saved_flags); - end_request(pf_req, 1); - pf_count = pf_req->current_nr_sectors; - pf_buf = pf_req->buffer; + pf_end_request(1); + if (pf_req) { + pf_count = pf_req->current_nr_sectors; + pf_buf = pf_req->buffer; + } spin_unlock_irqrestore(&pf_spin_lock, saved_flags); return 1; } @@ -810,7 +820,7 @@ static inline void next_request(int success) unsigned long saved_flags; spin_lock_irqsave(&pf_spin_lock, saved_flags); - end_request(pf_req, success); + pf_end_request(success); pf_busy = 0; do_pf_request(pf_queue); spin_unlock_irqrestore(&pf_spin_lock, saved_flags); -- 2.20.1