linux-dev/drivers/ntb/test, branch master

NTB: ntb_tool: uninitialized heap data in tool_fn_write()

2022-08-09T15:54:41Z

The call to: ret = simple_write_to_buffer(buf, size, offp, ubuf, size); will return success if it is able to write even one byte to "buf". The value of "*offp" controls which byte. This could result in reading uninitialized data when we do the sscanf() on the next line. This code is not really desigined to handle partial writes where *offp is non-zero and the "buf" is preserved and re-used between writes. Just ban partial writes and replace the simple_write_to_buffer() with copy_from_user(). Fixes: 578b881ba9c4 ("NTB: Add tool test client") Signed-off-by: Dan Carpenter Signed-off-by: Jon Mason

ntb: ntb_pingpong: remove redundant initialization of variables msg_data and spad_data

2021-09-05T22:04:46Z

The variables msg_data and spad_data are being initialized with values that are never read, they are being updated later on. The initializations are redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King Acked-by: Serge Semin Signed-off-by: Jon Mason

NTB: perf: Fix an error code in perf_setup_inbuf()

2021-09-04T22:36:04Z

When the function IS_ALIGNED() returns false, the value of ret is 0. So, we set ret to -EINVAL to indicate this error. Clean up smatch warning: drivers/ntb/test/ntb_perf.c:602 perf_setup_inbuf() warn: missing error code 'ret'. Reported-by: Abaci Robot Signed-off-by: Yang Li Reviewed-by: Serge Semin Signed-off-by: Jon Mason

NTB: Fix an error code in ntb_msit_probe()

2021-09-04T22:36:04Z

When the value of nm->isr_ctx is false, the value of ret is 0. So, we set ret to -ENOMEM to indicate this error. Clean up smatch warning: drivers/ntb/test/ntb_msi_test.c:373 ntb_msit_probe() warn: missing error code 'ret'. Reported-by: Abaci Robot Signed-off-by: Yang Li Reviewed-by: Logan Gunthorpe Signed-off-by: Jon Mason

NTB: Use struct_size() helper in devm_kzalloc()

2020-08-24T14:58:06Z

Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes. Also, remove unnecessary variable _struct_size_. This code was detected with the help of Coccinelle and, audited and fixed manually. Addresses-KSPP-ID: https://github.com/KSPP/linux/issues/83 Signed-off-by: Gustavo A. R. Silva Reviewed-by: Logan Gunthorpe Signed-off-by: Jon Mason

NTB: perf: Fix race condition when run with ntb_test

2020-06-06T00:02:09Z

When running ntb_test, the script tries to run the ntb_perf test immediately after probing the modules. Since adding multi-port support, this fails seeing the new initialization procedure in ntb_perf can not complete instantly. To fix this we add a completion which is waited on when a test is started. In this way, run can be written any time after the module is loaded and it will wait for the initialization to complete instead of sending an error. Fixes: 5648e56d03fa ("NTB: ntb_perf: Add full multi-port NTB API support") Signed-off-by: Logan Gunthorpe Acked-by: Allen Hubbe Tested-by: Alexander Fomichev Signed-off-by: Jon Mason

NTB: perf: Fix support for hardware that doesn't have port numbers

2020-06-06T00:02:09Z

Legacy drivers do not have port numbers (but is reliably only two ports) and was broken by the recent commit that added mult-port support to ntb_perf. This is especially important to support the cross link topology which is perfectly symmetric and cannot assign unique port numbers easily. Hardware that returns zero for both the local port and the peer should just always use gidx=0 for the only peer. Fixes: 5648e56d03fa ("NTB: ntb_perf: Add full multi-port NTB API support") Signed-off-by: Logan Gunthorpe Acked-by: Allen Hubbe Tested-by: Alexander Fomichev Signed-off-by: Jon Mason

NTB: perf: Don't require one more memory window than number of peers

2020-06-06T00:02:08Z

ntb_perf should not require more than one memory window per peer. This was probably an off-by-one error. Fixes: 5648e56d03fa ("NTB: ntb_perf: Add full multi-port NTB API support") Signed-off-by: Logan Gunthorpe Acked-by: Allen Hubbe Tested-by: Alexander Fomichev Signed-off-by: Jon Mason

NTB: ntb_pingpong: Choose doorbells based on port number

2020-06-06T00:02:08Z

This commit fixes pingpong support for existing drivers that do not implement ntb_default_port_number() and ntb_default_peer_port_number(). This is required for hardware (like the crosslink topology of switchtec) which cannot assign reasonable port numbers to each port due to its perfect symmetry. Instead of picking the doorbell to use based on the the index of the peer, we use the peer's port number. This is a bit clearer and easier to understand. Fixes: c7aeb0afdcc2 ("NTB: ntb_pp: Add full multi-port NTB API support") Signed-off-by: Logan Gunthorpe Acked-by: Allen Hubbe Tested-by: Alexander Fomichev Signed-off-by: Jon Mason

NTB: ntb_tool: reading the link file should not end in a NULL byte

2020-06-06T00:02:08Z

When running ntb_test this warning is issued: ./ntb_test.sh: line 200: warning: command substitution: ignored null byte in input This is caused by the kernel returning one more byte than is necessary when reading the link file. Reduce the number of bytes read back to 2 as it was before the commit that regressed this. Fixes: 7f46c8b3a552 ("NTB: ntb_tool: Add full multi-port NTB API support") Signed-off-by: Logan Gunthorpe Acked-by: Allen Hubbe Tested-by: Alexander Fomichev Signed-off-by: Jon Mason