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  1. 23 4月, 2014 6 次提交
  3. 17 4月, 2014 7 次提交
    • D
      isdn: icn: buffer overflow in icn_command() · b7a31405
      由 Dan Carpenter 提交于 
      This buffer over was detected using static analysis:

	drivers/isdn/icn/icn.c:1325 icn_command()
	error: format string overflow. buf_size: 60 length: 98

The calculation for the length of the string is off because it assumes
that the dial[] buffer holds a 50 character string, but actually it is
at most 31 characters and NUL.  I have removed the dial[] buffer because
it isn't needed.

The maximum length of the string is actually 79 characters and a NUL.  I
have made the cbuf[] array large enough to hold it and changed the
sprintf() to an snprintf() as a further safety enhancement.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      b7a31405
    • G
      net: mdio-gpio: Add support for separate MDI and MDO gpio pins · f1d54c47
      由 Guenter Roeck 提交于 
      This is for a system with fixed assignments of input and output pins
(various variants of Kontron COMe).
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f1d54c47
    • G
      net: mdio-gpio: Add support for active low gpio pins · 1d251481
      由 Guenter Roeck 提交于 
      Some systems using mdio-gpio may use active-low gpio pins
(eg with inverters or FETs connected to all or some of the
gpio pins).
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      1d251481
    • G
      net: mdio-gpio: Use devm_ functions where possible · 78cdb079
      由 Guenter Roeck 提交于 
      This simplifies error path and deinit/removal functions.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Tested-by: NChris Healy <cphealy@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      78cdb079
    • C
      mlx4_en: don't use napi_synchronize inside mlx4_en_netpoll · c98235cb
      由 Chris Mason 提交于 
      The mlx4 driver is triggering schedules while atomic inside
mlx4_en_netpoll:

	spin_lock_irqsave(&cq->lock, flags);
	napi_synchronize(&cq->napi);
		^^^^^ msleep here
	mlx4_en_process_rx_cq(dev, cq, 0);
	spin_unlock_irqrestore(&cq->lock, flags);

This was part of a patch by Alexander Guller from Mellanox in 2011,
but it still isn't upstream.
Signed-off-by: NChris Mason <clm@fb.com>
cc: stable@vger.kernel.org
Acked-By: NAmir Vadai <amirv@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      c98235cb
    • T
      net: mvneta: properly configure the MAC <-> PHY connection in all situations · 3f1dd4bc
      由 Thomas Petazzoni 提交于 
      Commit 5445eaf3 ('mvneta: Try to fix mvneta when compiled as
module') fixed the mvneta driver to make it work properly when loaded
as a module in SGMII configuration, which was tested successful by the
author on the Armada XP OpenBlocks AX3, which uses SGMII.

However, some other platforms, namely the Armada XP GP don't use
SGMII, but a QSGMII connection between the MAC and the PHY, and this
case was not supported by the mvneta driver, which was relying on
configuration put in place by the bootloader. While this works when
the mvneta driver is built-in (because clocks are not gated), it
breaks when mvneta is built as a module, because the clock is gated
(all configuration is lost) and then re-enabled when the mvneta driver
is loaded.

In order to support all of RGMII, SGMII and QSGMII, this commit
reworks how the PHY interface configuration is done, and simplifies
it: it removes the mvneta_port_sgmii_config() and
mvneta_gmac_rgmii_set() functions, which were strange because
mvneta_gmac_rgmii_set() was called in all cases, even for SGMII
configurations. Also, the mvneta_gmac_rgmii_set() function was taking
a boolean as argument, which was always true.

Instead, all the PHY interface configuration logic is moved into the
mvneta_port_power_up() function, in a much simpler 'switch' construct,
with four cases:

 - QSGMII: the RGMIIEn bit, the PCSEn bit in GMAC_CTRL_2 are set, and
   the SERDES is configured in QSGMII. Technically speaking,
   configuring the SERDES of the first port would be sufficient, but
   it is simpler to do it on all ports.

 - SGMII: the RGMIIEn bit, the PCSEn bit in GMAC_CTRL_2 are set, and
   the SERDES is configured as SGMII.

 - RGMII: the RGMIIEn bit in GMAC_CTRL_2 is set. The PCSEn bit is kept
   cleared, and no SERDES configuration is done, because RGMII is not
   using SERDES lanes.

 - other: an error is returned. For this reason, the
   mvneta_port_power_up() now returns an int instead of nothing, and
   the return value is checked by mvneta_probe().

This has been successfully tested on:

 * Armada XP DB, which has two RGMII and two SGMII connections
 * Armada XP GP, which uses QSGMII for its four interfaces
 * Armada 370 Mirabox, which has two RGMII connections
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      3f1dd4bc
    • E
      sfc:On MCDI timeout, issue an FLR (and mark MCDI to fail-fast) · e283546c
      由 Edward Cree 提交于 
      When an MCDI command times out (whether or not we find it
completed when we poll), call efx_mcdi_abandon(), which tells
all subsequent MCDI calls to fail-fast, and queues up an FLR.

Because an FLR doesn't lead to receiving any reboot even from
the MC (unlike most other types of reset), we have to call
efx_ef10_reset_mc_allocations.
In efx_start_all(), if a reset (of any kind) is pending, we
bail out.
Without this, attempts to reconfigure (e.g. change mtu) can
cause driver/mc state inconsistency if the first MCDI call
triggers an FLR.

For similar reasons, on EF10, in
efx_reset_down(method=RESET_TYPE_MCDI_TIMEOUT), set the number
of active queues to zero before calling efx_stop_all().
And, on farch, in efx_reset_up(method=RESET_TYPE_MCDI_TIMEOUT),
set active_queues and flushes pending & outstanding to zero.

efx_mcdi_mode_{poll,event}() should not take us out of fail-fast
 mode. Instead, this is done by efx_mcdi_reset() after the FLR
completes.

The new FLR reset_type RESET_TYPE_MCDI_TIMEOUT doesn't really
fit into the hierarchy of reset 'scopes' whereby efx_reset()
decides some resets subsume others.  Thus, it uses separate logic.

Also, fixed up some inconsistency around RESET_TYPE_MC_BIST,
which was in the wrong place in that hierarchy.
Signed-off-by: NShradha Shah <sshah@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e283546c
  5. 16 4月, 2014 5 次提交
  7. 15 4月, 2014 21 次提交
  9. 14 4月, 2014 1 次提交
    • T
      Revert "net: mvneta: fix usage as a module on RGMII configurations" · cc6ca302
      由 Thomas Petazzoni 提交于 
      This reverts commit e3a8786c. While
this commit allows to use the mvneta driver as a module on some
configurations, it breaks other configurations even if mvneta is used
built-in.

This breakage is due to the fact that on some RGMII platforms, the PCS
bit has to be set, and on some other platforms, it has to be
cleared. At the moment, we lack informations to know exactly the
significance of this bit (the datasheet only says "enables PCS"), and
so we can't produce a patch that will work on all platforms at this
point. And since this change is breaking the network completely for
many users, it's much better to revert it for now. We'll come back
later with a proper fix that takes into account all platforms.

Basically:

 * Armada XP GP is configured as RGMII-ID, and needs the PCS bit to be
   set.
 * Armada 370 Mirabox is configured as RGMII-ID, and needs the PCS bit
   to be cleared.

And at the moment, we don't know how to make the distinction between
those two cases. One hint is that the Armada XP GP appears in fact to
be using a QSGMII connection with the PHY (Quad-SGMII), but
configuring it as SGMII doesn't work, while RGMII-ID works. This needs
more investigation, but in the mean time, let's unbreak the network
for all those users.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reported-by: NArnaud Ebalard <arno@natisbad.org>
Reported-by: NAlexander Reuter <Alexander.Reuter@gmx.net>
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=73401
Cc: stable@vger.kernel.org
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      cc6ca302