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  1. 14 6月, 2009 1 次提交
  3. 11 6月, 2009 1 次提交
  5. 07 6月, 2009 1 次提交
  7. 25 5月, 2009 2 次提交
  9. 22 5月, 2009 1 次提交
  11. 19 5月, 2009 2 次提交
  13. 14 5月, 2009 1 次提交
  15. 23 4月, 2009 1 次提交
  17. 14 4月, 2009 2 次提交
  19. 07 4月, 2009 2 次提交
  21. 03 4月, 2009 1 次提交
  23. 29 3月, 2009 2 次提交
  25. 28 3月, 2009 1 次提交
  27. 21 3月, 2009 1 次提交
  29. 21 2月, 2009 1 次提交
    • M
      8250: fix boot hang with serial console when using with Serial Over Lan port · b6adea33
      由 Mauro Carvalho Chehab 提交于 
      Intel 8257x Ethernet boards have a feature called Serial Over Lan.

This feature works by emulating a serial port, and it is detected by
kernel as a normal 8250 port.  However, this emulation is not perfect, as
also noticed on changeset 7500b1f6.

Before this patch, the kernel were trying to check if the serial TX is
capable of work using IRQ's.

This were done with a code similar this:

        serial_outp(up, UART_IER, UART_IER_THRI);
        lsr = serial_in(up, UART_LSR);
        iir = serial_in(up, UART_IIR);
        serial_outp(up, UART_IER, 0);

        if (lsr & UART_LSR_TEMT && iir & UART_IIR_NO_INT)
		up->bugs |= UART_BUG_TXEN;

This works fine for other 8250 ports, but, on 8250-emulated SoL port, the
chip is a little lazy to down UART_IIR_NO_INT at UART_IIR register.

Due to that, UART_BUG_TXEN is sometimes enabled.  However, as TX IRQ keeps
working, and the TX polling is now enabled, the driver miss-interprets the
IRQ received later, hanging up the machine until a key is pressed at the
serial console.

This is the 6 version of this patch.  Previous versions were trying to
introduce a large enough delay between serial_outp and serial_in(up,
UART_IIR), but not taking forever.  However, the needed delay couldn't be
safely determined.

At the experimental tests, a delay of 1us solves most of the cases, but
still hangs sometimes.  Increasing the delay to 5us was better, but still
doesn't solve.  A very high delay of 50 ms seemed to work every time.

However, poking around with delays and pray for it to be enough doesn't
seem to be a good approach, even for a quirk.

So, instead of playing with random large arbitrary delays, let's just
disable UART_BUG_TXEN for all SoL ports.

[akpm@linux-foundation.org: fix warnings]
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      b6adea33
  31. 19 2月, 2009 1 次提交
  33. 18 2月, 2009 1 次提交
  35. 30 1月, 2009 2 次提交
  37. 29 1月, 2009 1 次提交
  39. 28 1月, 2009 1 次提交
  41. 26 1月, 2009 1 次提交
  43. 23 1月, 2009 1 次提交
  45. 22 1月, 2009 1 次提交
  47. 15 1月, 2009 1 次提交
  49. 07 1月, 2009 1 次提交
    • S
      Resurrect IT8172 IDE controller driver · 391ad190
      由 Shane McDonald 提交于 
      Support for the IT8172 IDE controller was removed from the kernel
sometime after 2.6.18.  Support for the only boards that used the IT8172
was removed from the kernel after 2.6.18, as they had never compiled
since 2.6.0.  However, there are a couple of platforms that use this
chip: the PMC-Sierra Xiao Hu thin-client computer, which is no longer
in production, and the Linksys NSS4000 Network Attached Storage box,
which is based on the Xiao Hu board.  I am attempting to add support
for the Xiao Hu to the kernel, and this IT8172 IDE controller is the
first bit of code in this effort.

This patch resurrects the IT8172 IDE controller code.  I began with
the 2.6.18 version of the it8172.c file, and have moved it forward so
that it works with the latest version of the kernel.  I have run this
driver on a PMC-Sierra Xiao Hu board with the 2.6.28 kernel, and
I have had no problems with it in my configuration.  The attached patch
applies cleanly against 2.6.28.
Signed-off-by: NShane McDonald <mcdonald.shane@gmail.com>
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: alan@lxorguk.ukuu.org.uk
[bart: s/HWIF(drive)/drive->hwif/]
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
      391ad190
  51. 03 1月, 2009 2 次提交
  53. 24 10月, 2008 1 次提交
  55. 22 10月, 2008 1 次提交
  57. 21 10月, 2008 1 次提交
  59. 17 10月, 2008 1 次提交
  61. 01 10月, 2008 1 次提交
  63. 25 9月, 2008 1 次提交
  65. 18 9月, 2008 1 次提交