From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bartlomiej Zolnierkiewicz Subject: [PATCH 1/5] ide: add ide_pad_transfer() helper Date: Sat, 12 Apr 2008 21:03:15 +0200 Message-ID: <200804122103.15491.bzolnier@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from fg-out-1718.google.com ([72.14.220.156]:16865 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755738AbYDLSvl (ORCPT ); Sat, 12 Apr 2008 14:51:41 -0400 Received: by fg-out-1718.google.com with SMTP id l27so857243fgb.17 for ; Sat, 12 Apr 2008 11:51:40 -0700 (PDT) Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Borislav Petkov * Add ide_pad_transfer() helper (which uses ->{in,out}put_data methods internally so the transfer is also padded to drive+host requirements) and use it instead of ide_atapi_{write_zeros,discard_data}(). * Remove no longer needed ide_atapi_{write_zeros,discard_data}(). Cc: Borislav Petkov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-floppy.c | 7 ++----- drivers/ide/ide-io.c | 15 +++++++++++++++ drivers/ide/ide-tape.c | 4 ++-- drivers/scsi/ide-scsi.c | 6 +++--- include/linux/ide.h | 25 ++----------------------- 5 files changed, 24 insertions(+), 33 deletions(-) Index: b/drivers/ide/ide-floppy.c =================================================================== --- a/drivers/ide/ide-floppy.c +++ b/drivers/ide/ide-floppy.c @@ -262,10 +262,7 @@ static void ide_floppy_io_buffers(ide_dr if (bcount) { printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n", drive->name, __func__, bcount); - if (direction) - ide_atapi_write_zeros(drive, bcount); - else - ide_atapi_discard_data(drive, bcount); + ide_pad_transfer(drive, direction, bcount); } } @@ -491,7 +488,7 @@ static ide_startstop_t idefloppy_pc_intr printk(KERN_ERR "ide-floppy: The floppy wants " "to send us more data than expected " "- discarding data\n"); - ide_atapi_discard_data(drive, bcount); + ide_pad_transfer(drive, 0, bcount); ide_set_handler(drive, &idefloppy_pc_intr, Index: b/drivers/ide/ide-io.c =================================================================== --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -1642,3 +1642,18 @@ void ide_pktcmd_tf_load(ide_drive_t *dri } EXPORT_SYMBOL_GPL(ide_pktcmd_tf_load); + +void ide_pad_transfer(ide_drive_t *drive, int write, int len) +{ + ide_hwif_t *hwif = drive->hwif; + u8 buf[4] = { 0 }; + + while (len > 0) { + if (write) + hwif->output_data(drive, NULL, buf, min(4, len)); + else + hwif->input_data(drive, NULL, buf, min(4, len)); + len -= 4; + } +} +EXPORT_SYMBOL_GPL(ide_pad_transfer); Index: b/drivers/ide/ide-tape.c =================================================================== --- a/drivers/ide/ide-tape.c +++ b/drivers/ide/ide-tape.c @@ -395,7 +395,7 @@ static void idetape_input_buffers(ide_dr if (bh == NULL) { printk(KERN_ERR "ide-tape: bh == NULL in " "idetape_input_buffers\n"); - ide_atapi_discard_data(drive, bcount); + ide_pad_transfer(drive, 0, bcount); return; } count = min( @@ -871,7 +871,7 @@ static ide_startstop_t idetape_pc_intr(i printk(KERN_ERR "ide-tape: The tape wants to " "send us more data than expected " "- discarding data\n"); - ide_atapi_discard_data(drive, bcount); + ide_pad_transfer(drive, 0, bcount); ide_set_handler(drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL); return ide_started; Index: b/drivers/scsi/ide-scsi.c =================================================================== --- a/drivers/scsi/ide-scsi.c +++ b/drivers/scsi/ide-scsi.c @@ -164,7 +164,7 @@ static void idescsi_input_buffers(ide_dr if (bcount) { printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n"); - ide_atapi_discard_data(drive, bcount); + ide_pad_transfer(drive, 0, bcount); } } @@ -201,7 +201,7 @@ static void idescsi_output_buffers(ide_d if (bcount) { printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n"); - ide_atapi_write_zeros(drive, bcount); + ide_pad_transfer(drive, 1, bcount); } } @@ -438,7 +438,7 @@ static ide_startstop_t idescsi_pc_intr ( } pc->xferred += temp; pc->cur_pos += temp; - ide_atapi_discard_data(drive, bcount - temp); + ide_pad_transfer(drive, 0, bcount - temp); ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); return ide_started; } Index: b/include/linux/ide.h =================================================================== --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -816,6 +816,8 @@ void ide_execute_command(ide_drive_t *, void ide_execute_pkt_cmd(ide_drive_t *); +void ide_pad_transfer(ide_drive_t *, int, int); + ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8); ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat); @@ -1346,27 +1348,4 @@ static inline u8 ide_read_error(ide_driv return hwif->INB(hwif->io_ports.error_addr); } - -/* - * Too bad. The drive wants to send us data which we are not ready to accept. - * Just throw it away. - */ -static inline void ide_atapi_discard_data(ide_drive_t *drive, unsigned bcount) -{ - ide_hwif_t *hwif = drive->hwif; - - /* FIXME: use ->input_data */ - while (bcount--) - (void)hwif->INB(hwif->io_ports.data_addr); -} - -static inline void ide_atapi_write_zeros(ide_drive_t *drive, unsigned bcount) -{ - ide_hwif_t *hwif = drive->hwif; - - /* FIXME: use ->output_data */ - while (bcount--) - hwif->OUTB(0, hwif->io_ports.data_addr); -} - #endif /* _IDE_H */