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Tejun Heo 55a8e2c83c [PATCH] libata: implement presence detection via polling IDENTIFY 
On some controllers (ICHs in piix mode), there is *NO* reliable way to
determine device presence other than issuing IDENTIFY and see how the
transaction proceeds by watching the TF status register.

libata acted this way before irq-pio and phantom devices caused very
little problem but now that IDENTIFY is performed using IRQ drive PIO,
such phantom devices now result in multiple 30sec timeouts during
boot.

This patch implements ATA_FLAG_DETECT_POLLING.  If a LLD sets this
flag, libata core issues the initial IDENTIFY in polling mode and if
the initial data transfer fails w/ HSM violation, the port is
considered to be empty thus replicating the old libata and IDE
behavior.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-01 22:45:55 -05:00
..
acpi ACPI: Change ACPI to use dev_archdata instead of firmware_data 2006-12-01 14:52:01 -08:00
asm-alpha Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-arm [libata] ARM: add ixp4xx PATA driver 2006-12-01 22:42:51 -05:00
asm-arm26 Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-avr32 Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-cris Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-frv Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-generic Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-h8300 Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-i386 ACPI: Change ACPI to use dev_archdata instead of firmware_data 2006-12-01 14:52:01 -08:00
asm-ia64 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 2006-12-01 16:41:27 -08:00
asm-m32r Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-m68k Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-m68knommu Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2006-12-01 16:41:07 -08:00
asm-mips Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus 2006-12-01 16:44:02 -08:00
asm-parisc Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2006-12-01 16:41:07 -08:00
asm-powerpc Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 2006-12-01 16:41:27 -08:00
asm-ppc Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-s390 Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-sh Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-sh64 Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-sparc Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-sparc64 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 2006-12-01 16:41:27 -08:00
asm-um Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-v850 Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
asm-x86_64 ACPI: Change ACPI to use dev_archdata instead of firmware_data 2006-12-01 14:52:01 -08:00
asm-xtensa Driver core: add dev_archdata to struct device 2006-12-01 14:52:01 -08:00
crypto
keys
linux [PATCH] libata: implement presence detection via polling IDENTIFY 2006-12-01 22:45:55 -05:00
math-emu
media
mtd
net [NET]: Re-fix of doc-comment in sock.h 2006-11-25 15:16:51 -08:00
pcmcia
rdma IB/cm: Fix automatic path migration support 2006-11-29 15:33:10 -08:00
rxrpc
scsi [PATCH] add missing libsas include to fix s390 compilation. 2006-11-28 17:26:50 -08:00
sound Driver core: convert sound core to use struct device 2006-12-01 14:52:01 -08:00
video
Kbuild