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path: root/drivers/scsi/dc395x.c
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Diffstat (limited to 'drivers/scsi/dc395x.c')
-rw-r--r--drivers/scsi/dc395x.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c
index 600ba1202864..c44af5795b10 100644
--- a/drivers/scsi/dc395x.c
+++ b/drivers/scsi/dc395x.c
@@ -976,6 +976,16 @@ static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
}
}
+static inline void pio_trigger(void)
+{
+ static int feedback_requested;
+
+ if (!feedback_requested) {
+ feedback_requested = 1;
+ printk(KERN_WARNING "%s: Please, contact <linux-scsi@vger.kernel.org> "
+ "to help improve support for your system.\n", __FILE__);
+ }
+}
/* Prepare SRB for being sent to Device DCB w/ command *cmd */
static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
@@ -2320,6 +2330,7 @@ static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
CFG2_WIDEFIFO);
while (DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) != 0x40) {
u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
+ pio_trigger();
*(srb->virt_addr)++ = byte;
if (debug_enabled(DBG_PIO))
printk(" %02x", byte);
@@ -2331,6 +2342,7 @@ static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
/* Read the last byte ... */
if (srb->total_xfer_length > 0) {
u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
+ pio_trigger();
*(srb->virt_addr)++ = byte;
srb->total_xfer_length--;
if (debug_enabled(DBG_PIO))
@@ -2507,6 +2519,7 @@ static void data_io_transfer(struct AdapterCtlBlk *acb,
if (debug_enabled(DBG_PIO))
printk(" %02x", (unsigned char) *(srb->virt_addr));
+ pio_trigger();
DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
*(srb->virt_addr)++);