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drivers: net: davinci_cpdma: acknowledge interrupt properly

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CPDMA interrupts are not properly acknowledged which leads to interrupt
storm, only cpdma interrupt 0 is acknowledged in Davinci CPDMA driver.
Changed cpdma_ctlr_eoi api to acknowledge 1 and 2 interrupts which are
used for rx and tx respectively.

Reported-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mugunthan V N
2013-02-17 22:19:20 +00:00
committed by David S. Miller
parent 4153577a8d
commit 510a1e7249
3 changed files with 25 additions and 13 deletions
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7
drivers/net/ethernet/ti/davinci_cpdma.h
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@@ -26,6 +26,11 @@
#define CPDMA_RX_SOURCE_PORT(__status__) ((__status__ >> 16) & 0x7)
#define CPDMA_EOI_RX_THRESH 0x0
#define CPDMA_EOI_RX 0x1
#define CPDMA_EOI_TX 0x2
#define CPDMA_EOI_MISC 0x3
struct cpdma_params {
struct device *dev;
void __iomem *dmaregs;
@@ -88,7 +93,7 @@ int cpdma_chan_submit(struct cpdma_chan *chan, void *token, void *data,
int cpdma_chan_process(struct cpdma_chan *chan, int quota);
int cpdma_ctlr_int_ctrl(struct cpdma_ctlr *ctlr, bool enable);
void cpdma_ctlr_eoi(struct cpdma_ctlr *ctlr);
void cpdma_ctlr_eoi(struct cpdma_ctlr *ctlr, u32 value);
int cpdma_chan_int_ctrl(struct cpdma_chan *chan, bool enable);
bool cpdma_check_free_tx_desc(struct cpdma_chan *chan);