linux-kernel - [PATCH 4.4 87/91] dmaengine: ipu: Make sure the interrupt routine checks all interrupts.

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Message-Id: <20170310083905.131910886@linuxfoundation.org>
Date:   Fri, 10 Mar 2017 10:09:26 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Vinod Koul <vinod.koul@...el.com>,
        Magnus Lilja <lilja.magnus@...il.com>
Subject: [PATCH 4.4 87/91] dmaengine: ipu: Make sure the interrupt routine checks all interrupts.

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Magnus Lilja <lilja.magnus@...il.com>

commit adee40b265d7568296e218f079f478197ffa15bf upstream.

Commit 3d8cc00073d6 ("dmaengine: ipu: Consolidate duplicated irq handlers")
consolidated the two interrupts routines into one, but the remaining
interrupt routine only checks the status of the error interrupts, not the
normal interrupts.

This patch fixes that problem (tested on i.MX31 PDK board).

Fixes: 3d8cc00073d6 ("dmaengine: ipu: Consolidate duplicated irq handlers")
Cc: Vinod Koul <vinod.koul@...el.com>
Signed-off-by: Magnus Lilja <lilja.magnus@...il.com>
Signed-off-by: Vinod Koul <vinod.koul@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/dma/ipu/ipu_irq.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/dma/ipu/ipu_irq.c
+++ b/drivers/dma/ipu/ipu_irq.c
@@ -272,7 +272,7 @@ static void ipu_irq_handler(struct irq_d
 	u32 status;
 	int i, line;
 
-	for (i = IPU_IRQ_NR_FN_BANKS; i < IPU_IRQ_NR_BANKS; i++) {
+	for (i = 0; i < IPU_IRQ_NR_BANKS; i++) {
 		struct ipu_irq_bank *bank = irq_bank + i;
 
 		raw_spin_lock(&bank_lock);