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wl1271: Improve command polling

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In testing I noticed that the wl1271 commands fall into two categories. In the
first category are "fast" commands, these mostly take only 0 or 1 polls to
complete, but occasionally upto 50 (giving a 0.5ms execution time.) In the
second category, the command completion takes well more than 0.5ms (from
1.5ms upwards.)

This patch fixes command polling such that it is optimal for the fast commands,
but also allows sleep for the longer ones.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Juuso Oikarinen 2010-04-28 09:49:59 +03:00 committed by John W. Linville
parent 62dad5b0be
commit 16092b5ccc
1 changed files with 5 additions and 5 deletions
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10
drivers/net/wireless/wl12xx/wl1271_cmd.c
View File

@ -36,7 +36,7 @@
#include "wl1271_cmd.h"
#include "wl1271_event.h"
#define WL1271_CMD_POLL_COUNT 5
#define WL1271_CMD_FAST_POLL_COUNT 50
/*
* send command to firmware
@ -76,11 +76,11 @@ int wl1271_cmd_send(struct wl1271 *wl, u16 id, void *buf, size_t len,
goto out;
}
udelay(10);
poll_count++;
if (poll_count == WL1271_CMD_POLL_COUNT)
wl1271_info("cmd polling took over %d cycles",
poll_count);
if (poll_count < WL1271_CMD_FAST_POLL_COUNT)
udelay(10);
else
msleep(1);
intr = wl1271_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
}